Add to cleanup

Just browsing through trying to see what can be cleaned up to save space.

```
/include
/lib/**/cmake
/lib/**/pkgconfig
```

Can the pycache be added? `/lib/python3.13/site-packages/packaging/__pycache__`

I see in `/lib/python3.13/site-packages/PySide6/Qt/lib` some `libavcodec` / `libavformat` bits, are these ffmpeg? Can they be removed and use the ffmpeg extension?

Start with the cleanup paths in the issue, especially /lib/python3.13/site-packages/packaging/__pycache__ and /lib/python3.13/site-packages/PySide6/Qt/lib. Determine whether the pycache and libavcodec/libavformat files are required, and whether the ffmpeg extension can replace them; done means the removable contents are identified without breaking the base app.

Written by the indexing model from the issue text.