SoundtrackPlayer

- Ported to Fabric 26.2 and NeoForge 1.20.1, 1.20.4, 1.21.1, 1.21.4, 1.21.5, 1.21.8, 1.21.11 and 26.2
- 1.20.x builds run on Java 17 again
- `/soundtrack play <id> resource <sound>` and `/soundtrack play <id> url <link>`, no quotes needed and resource autocompletes the resource pack sounds
- Soundtracks folder: `.ogg` files in `assets/<namespace>/soundtracks/` of a resource pack work without a sounds.json and show up in tab completion after F3+T
- Any link works: plain ogg/mp3/wav files, pages like YouTube or SoundCloud and other media like mp4 or m4a. The tools they need download by themselves the first time
- Playing the same id and sound again changes volume, pitch or fades live without restarting the song
- Local soundtracks keep playing (on the right second) after leaving and joining a world
- The mod only talks in chat when something goes wrong
- Late joiners, rejoins and resource reloads start the song at the same second as everyone else
- F3+T and the pause menu no longer stop soundtracks
- `stop` has an optional fade out that overrides the track's own one
- `fadeloop` option: fade every lap of a loop in and out
- `category` option: play in any vanilla sound category, default is the new SOUNDTRACKS one
- "Soundtracks" volume slider in Music & Sounds, translated to 20 languages
- `/soundtrack list` and `/soundtrack stop all`
- Tracks in a category at 0% come back when the slider goes up again
- Tracks from one server no longer keep playing on the next one
- Server side API and client side API
- Forge jars now ship a mixin refmap so they work outside the dev environment