Custom Jukebox Discs

### Added

- Modern Music Players and portable players with playlists, shuffle, repeat, seeking, volume and range controls.
- Shoulder boombox mode: sneak-right-click with a Music Player in your main hand to carry it, with an animated supporting arm and moving public audio.
- Multiple portable player colors and headphone styles, including cat and bunny ears.
- Headphones for private portable playback, optional Curios support and a toggleable headphone indicator.
- Per-disc volume controls in the Disc Writer, with volume shown in disc tooltips.
- Redstone-controlled vanilla jukebox range with a configurable multiplier (default x3).
- Optional personal server libraries, with private/shared controls in both the Disc Writer and Music Player.
- Recipe discovery from crafting ingredients.

### Improved

- Clearer playlist management, item instructions and Disc Writer feedback.
- Better text clipping and library list layout.
- Playback cleanup during rapid seeking and track changes.
- Moving vanilla jukebox support and sound cleanup on Create contraptions in 1.21.1.
- Portable player orientation and shoulder boombox positioning.

### Notes

- Headphones affect Portable Players only; placed and shoulder-carried Music Players remain audible nearby.
- Modern players use their own interface controls rather than redstone range or per-disc volume.
- Switching away from the shoulder-carried player lowers it and stops its sound without resetting saved playback settings.
- Personal libraries are optional and controlled by the server configuration.