Support of MP3 star rating tag

[stax76]

I would like to request support of the MP3 star rating tag:

https://en.wikipedia.org/wiki/ID3?oldformat=true#ID3v2_star_rating_tag_issue

My files are tagged like so:

1star: POPULARIMETER: MusicBee|1|0 2star: POPULARIMETER: MusicBee|64|0 3star: POPULARIMETER: MusicBee|128|0 4star: POPULARIMETER: MusicBee|196|0 5star: POPULARIMETER: MusicBee|255|0

sample.zip

More info:

https://github.com/Martchus/tageditor/issues/84

https://github.com/mpv-player/mpv/issues/10291