Raveberry

- adapt mopidy-spotify installation according to https://github.com/mopidy/mopidy-spotify
- volume normalization: install arm64 package for aarch64 architecture during install

- Update mopidy repository to debian bullseye
- Allow pip to install system packages
- Hide color indicator when voting indicators are disabled

- Voting behavior is indicated
- Users are represented by different colors
- Users can override their assigned color
- Needs to be enabled in settings

- Requested songs from random suggestion for unavailable platforms are no longer discarded
- Instead they are searched for in available platforms
- Fake player no longer relies on mopidy

- nginx port can be customized
- "Max Playlist Length" setting honored for Spotify playlists

- New Spotify feature: device playback
- Any logged in Spotify app can be used as playback device
- Local playback is still possible, can switch between the two
- Credentials are checked for both local and device mode
- Added documentation on how to provide credentials
- Abstraction for two different players: mopidy and spotify

- Youtube Music is used for searches
- music.youtube.com links are parsed correctly
- Client streaming for Youtube did not work reliably, was removed
- Sound outputs have more descriptive names and are grouped
- Docker setup also logs low severity messages
- Too frequent alarms are prevented
- Storing dark/light theme preferences does not clash with django's

- Check whether Jamendo songs are streamable before enqueuing them