hesis: more grids for everyone

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- (INFOGA? low-res graphics using unicode blocks?)

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floaty screen shots

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goneovim screen shots of different font size

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Neovim is now half an tmux (and I did this completely by accident. We did not even think about it when w did floats. float win + term buf just work, as buffers and windows are orthogonal)

- A text window is a grid
- The pum is a grid
- The extra info next to the pum is also a grid
- The cmdline is a grid
- Messages is a grid
- Libvterm l