Update docs to new frontend/UI
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We can have the docstrings of the properties that are missing docstrings (from discussion [here](https://github.com/huggingface/doc-builder/pull/96)) here by using your new `inject_arrow_table_documentation` onthem as well ?
2022-02-15T18:16:59Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1040617417
https://api.github.com/repos/huggingface/datasets/issues/3690
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@sgugger & @lhoestq could you help me with what should the `docs` section in setup.py be changed to [here](https://github.com/huggingface/datasets/blob/master/setup.py#L212-L227) ?

as a reference, here is a transformers setup.py docs [section](https://github.com/huggingface/transformers/blob/master/setup.py#L304-L308)
2022-02-17T13:13:47Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1042937008
https://api.github.com/repos/huggingface/datasets/issues/3690
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For now, you can put an empty list. Once the `doc-builder` is in a PyPi package (with the bug we fixed on Datasets but still waiting on the standing PR with the code switch) we can put it there.
2022-02-17T14:01:25Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1042980349
https://api.github.com/repos/huggingface/datasets/issues/3690
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None of those dependencies are needed from this list?

```py
    "docs": [
        "docutils==0.16.0",
        "recommonmark",
        "sphinx==3.1.2",
        "sphinx-markdown-tables",
        "sphinx-rtd-theme==0.4.3",
        "sphinxext-opengraph==0.4.1",
        "sphinx-copybutton",
        "fsspec<2021.9.0",
        "s3fs",
        "sphinx-panels",
        "sphinx-inline-tabs",
        "myst-parser",
        "Markdown!=3.3.5",
    ],
```
2022-02-17T14:18:30Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1042997745
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-02-17T14:18:30Z
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No, that was all for sphinx. The only thing needed to build the doc is a pip install of `doc-builder` (only from git right now).
2022-02-17T14:46:03Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1043025795
https://api.github.com/repos/huggingface/datasets/issues/3690
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@lhoestq feel free to request reviews from other maintainers 😊
2022-02-18T09:34:50Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1044218182
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-02-18T09:34:50Z
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Thanks ! @mariosasko and @albertvillanova feel free to take a look :)
I can do a thorough review this afternoon
2022-02-18T11:43:33Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1044387536
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-02-18T11:43:33Z
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Cool thanks ! Feel free to merge master into this branch and run `make style` to fix the python code formatting
2022-02-22T09:30:17Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1047594919
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-02-22T09:30:17Z
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Love the colorful vibes here!
![Screen Shot 2022-02-22 at 9 54 17 AM](https://user-images.githubusercontent.com/59462357/155193444-45e639dc-79cd-463c-98ad-1d44a6d6d385.png) 
2022-02-22T18:12:35Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1048076173
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-02-22T18:12:35Z
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I just fixed the conflicts with the `master` branch :)

Could you update preprod please ? Or is there a preview somewhere I can check to make sure everything is ok ?
2022-03-02T11:26:05Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1056817235
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-02T11:26:31Z
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> Could you update preprod please ? Or is there a preview somewhere I can check to make sure everything is ok ?

I'll let you know once preprod gets updated
2022-03-02T12:39:22Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1056885105
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-02T12:39:22Z
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@lhoestq @stevhliu updated [preprod](https://moon-preprod.huggingface.co/docs/datasets/index) with the latest; please let e know if you see any errors
2022-03-02T13:35:45Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1056938868
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-02T13:35:45Z
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One more tiny error that doesn't seem specific to Datasets (Transformers example [here](https://huggingface.co/docs/transformers/multilingual#xlm-language-embeddings)), but apostrophes and symbols aren't properly displayed in the right navbar:

![Screen Shot 2022-03-02 at 8 39 10 AM](https://user-images.githubusercontent.com/59462357/156406988-27e79533-b02a-4fc2-af32-8ad84657488f.png)
2022-03-02T16:44:54Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1057140945
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-02T16:44:54Z
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In the latest commit https://github.com/huggingface/datasets/pull/3690/commits/20bddf28b22798c309e6eb1198a716f055889e1b, I tried to reflect changes from https://github.com/huggingface/transformers/pull/15903 , however, the gh workflow is not being triggered. @lhoestq do you know why it might be the case?

eve though, we have 
https://github.com/huggingface/datasets/blob/20bddf28b22798c309e6eb1198a716f055889e1b/.github/workflows/build_dev_documentation.yml#L3-L7
2022-03-03T10:57:23Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1057924986
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-03T10:58:12Z
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I removed this line to trigger the job
```
  pull_request:
```

but got this error
```
[Error: .github#L1](https://github.com/huggingface/datasets/commit/033fe623c556b9dbc964708b672ff9bb4896c906#annotation_2897984435)
a step cannot have both the `uses` and `run` keys
```
2022-03-03T11:21:54Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1057944889
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-03T11:21:54Z
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It seems to be running again, and I re-added the line I removed.

Now the error is
```
> Run cd doc-build-dev && ...
README.md
datasets
transformers
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
Error: Process completed with exit code 1.
```
2022-03-03T11:29:04Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1057950087
https://api.github.com/repos/huggingface/datasets/issues/3690
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2022-03-03T11:30:41Z
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@lhoestq if the CI passes, Im gonna merge this PR
please let me know if that sounds good
2022-03-03T19:45:20Z
https://github.com/huggingface/datasets/pull/3690#issuecomment-1058421393
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### TLDR: Update `datasets` `docs` to the new syntax (markdown and mdx files) & frontend (as how it looks on [hf.co/transformers](https://huggingface.co/docs/transformers/index))

| Light mode                                                                                 | Dark mode                                                             |
|-----------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------|
| <img width="400" alt="Screenshot 2022-02-17 at 14 15 34" src="https://user-images.githubusercontent.com/11827707/154489358-e2fb3708-8d72-4fb6-93f0-51d4880321c0.png">    | <img width="400" alt="Screenshot 2022-02-17 at 14 16 27" src="https://user-images.githubusercontent.com/11827707/154489596-c5a1311b-181c-4341-adb3-d60a7d3abe85.png">                                     |

## Checklist

- [x] update datasets docs to new syntax (should call `doc-builder convert`) (this PR)
- [x] discuss `@property` methods frontend https://github.com/huggingface/doc-builder/pull/87
- [x] discuss `inject_arrow_table_documentation` (this PR) https://github.com/huggingface/datasets/pull/3690#discussion_r801847860
- [x] update datasets docs path on moon-landing https://github.com/huggingface/moon-landing/pull/2089
- [x] convert pyarrow docstring from Numpydoc style to groups style  https://github.com/huggingface/doc-builder/pull/89(https://stackoverflow.com/a/24385103/6558628)
- [x] handle `Raises` section on frontend and doc-builder https://github.com/huggingface/doc-builder/pull/86
- [x] check imgs path (this PR) (nothing to update here)
- [x] doc exaples block has to follow format `Examples::` https://github.com/huggingface/datasets/pull/3693
- [x] fix [this docstring](https://github.com/huggingface/datasets/blob/6ed6ac9448311930557810383d2cfd4fe6aae269/src/datasets/arrow_dataset.py#L3339) (causing svelte compilation error)
- [x] Delete sphinx related files 
- [x] Delete sphinx CI
- [x]  Update docs config in setup.py
- [x] add `versions.yml` in doc-build  https://github.com/huggingface/doc-build/pull/1
- [x] add `versions.yml` in doc-build-dev https://github.com/huggingface/doc-build-dev/pull/1
- [x] https://github.com/huggingface/moon-landing/pull/2089
- [x] format docstrings for example `datasets.DatasetBuilder.download_and_prepare` args format look wrong
- [x] create new github actions. (can probably be in a separate PR) (see the transformers equivalents below)
1. [build_dev_documentation.yml](https://github.com/huggingface/transformers/blob/master/.github/workflows/build_dev_documentation.yml)
2. [build_documentation.yml](https://github.com/huggingface/transformers/blob/master/.github/workflows/build_documentation.yml)
3. [delete_dev_documentation.yml](https://github.com/huggingface/transformers/blob/master/.github/workflows/delete_dev_documentation.yml)

## Note to reviewers

The number of changed files is a lot (100+) because I've converted all `.rst` files to `.mdx` files & they are compiling fine on the svelte side (also, moved all the imgs to to [doc-imgs repo](https://huggingface.co/datasets/huggingface/documentation-images/tree/main/datasets)). Moreover, you should just review them on preprod and see if the rendering look fine.
_Therefore, I'd suggest to focus on the changed_ **`.py`** and **CI files** (github workflows, etc. you can use [this filter here](https://github.com/huggingface/datasets/pull/3690/files?file-filters%5B%5D=.py&file-filters%5B%5D=.yml&show-deleted-files=true&show-viewed-files=true)) during the review & ignore `.mdx` files. (if there's a bug in `.mdx` files, we can always handle it in a separate PR afterwards).