refactor: thumbnail renderers

[TrigamDev]

Summary

• The renderers have been split out from src/tagstudio/qt/previews/renderer.py, moving them into their own files in src/tagstudio/qt/previews/renderers/*_renderer.py.
• Renderers, instead of accepting a long list of variables, accept a RendererContext object, which provides the file path, file extension, image size, pixel ratio, and whether the image is being used for a grid thumbnail.
• The .tar and .7zip file wrappers have been split out from src/tagstudio/qt/previews/renderer.py, moving them into their own files in src/tagstudio/qt/helpers/file_wrappers/archive/*_file.py.
  • Wrappers have also been for .zip and .rar files. This is because:
    • Checking against the archive file type in renderer.py would result in a circular dependency, plus checking against type[ArchiveFile] is nicer.
    • Some tweaks needed to be made to handle a weird case where zip files were including the name of the file in their file paths. Using a wrapper makes this much easier to handle cleanly and include the fix for the other archive files.
    • Some slight naming tweaks were made to better match the usual formatting. Since the wrappers were made to emulate the API of zip files, a wrapper needed to be added around zip files to make them consistent with the tweaked naming.
    • A helper method was added for checking if a file is contained within the archive file. This isn't necessary by any means, it's just nice to have.
• .exr files are now handled better.
  • Not entirely sure if it's just from the files I tested with, but thumbnails weren't able to be generated for them, and their stats (width/height) couldn't be loaded.
  • They now have a new thumbnail renderer using OpenEXR. OpenEXR is also now used to get their width and height.
• Fixed iWork files (sometimes) failing to generate a thumbnail.
  • Again, not sure if it's just the files I was testing with, but they weren't able to generate their thumbnails due to the issue mentioned above with .zip files including their name in their file paths.
• Various other tweaks, such as more descriptive variable naming, added type hints, and preferring functions over static methods.

Notes

I wasn't sure what to do with the following files, so I just left them where they were.

• src/tagstudio/qt/previews/vendored/ffmpeg.py
• src/tagstudio/qt/previews/vendored/pydub/audio_segment.py
• src/tagstudio/qt/previews/vendored/pydub/utils.py

Tasks Completed

• Platforms Tested:
  • [ ] Windows x86
  • [ ] Windows ARM
  • [ ] macOS x86
  • [ ] macOS ARM
  • [x] Linux x86
  • [ ] Linux ARM
• Tested For:
  • [x] Basic functionality
  • [ ] PyInstaller executable