feat: add library cleanup screen and 'fix ignored files' window

[CyanVoxel]

Warning

This PR makes changes to translation files outside of en.json, requiring the Weblate project to be locked and any changes synchronized between the repositories. This message and the "Status: Blocked" label serve as a reminder to the maintainer merging this.

Summary

This PR builds off of #1056 to introduce a "Cleanup" section to the "Library Information" window. This includes the following functionality:

• Centralized buttons to address library issues
• Centralized counts of unlinked and ignored entries
• Fix ignored file entries by culling them from your library (Close [Feature Request]: Manually Remove Entries from Library #1050)
• View the number of library backups you have and the amount of space they take up on disk
• View if you still have a legacy JSON library in your library folder that can be removed at your discretion
• View the internal library database version number and compare to the latest version

Tasks Completed

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