More Metadata Stuff

[majora2007]

Added

• Added: (Kavita+) Ability to download series covers from match flow
• Added: (Kavita+) Ability to override locked fields when performing a match to update metadata

Changed

• Changed: (Kavita+) Age Rating mappings from Kavita+ Metadata settings will apply when scanning in series.
• Changed: (Kavita+) When using edit series modal, also recalculate age rating based on tags/genres
• Changed: (Kavita+) Move the actual fixing of the match to a background thread.
• Changed: (Kavita+) Matched Metadata screen has a library name and actionable is replaced with a dedicated button
• Changed: (Kavita+) Fix Match is now in a background thread
• Changed: (Kavita+) Characters are now ordered based on their role in the Series (Main, Supporting, Background)

Fixed

• Fixed: (Kavita+) Series with Don't Match shouldn't show up in the Not Matched table
• Fixed: (Kavita+) Fixed an issue where a bad match can write tags/people then fixing the match wouldn't remove the bad match people due to not understanding the difference between existing metadata and what came from Kavita+
• Fixed: Fixed Characters field not being wired up in the Save API.
• Fixed: Fixed location locked field not being wired up in the Save API.

Part of #2979