Pre-release improvements and final feature updates

[LumePart]

This PR will contain final fixes and enhancements before the v1.2 release

Includes (but not limited to):

• Generalized track matching across supported systems with weighted ranking
• More accurate metadata appending for vorbis and id3 containers (mainly flac and mp3)
• Applied filter list for tracks from ytmusicapi
• Hidden downloader priority system in the setup wizard
• Update yt-dlp daily instead of every job run. Use the package from PyPi, as it updates faster
• A more strict CONTRIBUTING.md

Fixes

• Playlist schedules are re-added to cronjob after container restart leading to duplicated entries #222,
• Playlist naming #215
• Fixed custom playlist cover paths being overwritten on subsequent runs