Add image comparison slider functionality using gradio-imageslider. Update layout for frame display and enhance overall quality metric description. Update project dependencies in pyproject.toml and uv.lock.

Update project name from "FrameLens" to "FrameArena" in pyproject.toml and modify short description in README for clarity.

Initial commit of the FrameLens project, including core application logic in app.py, configuration files (.python-version, pyproject.toml, requirements.txt), example video data (data.json), and necessary assets (.DS_Store). The application supports frame-by-frame video comparison using various metrics.