Port of the mod to 1.21
Changes the bookshelf compatibility check to allow any music disc, rather than just items tagged as music discs.
These new builds have also been verified compatible with Quilt Loader.
Initial release.
At this stage, there's no visual indicator as to which shelves contain books and which contain discs, but that feature is planned. It would also be pretty cool to be able to store more than six records in a bookshelf. Maybe then I could have a visually satisfying way to show off all my copies of "Cat."
At this time only Minecraft 1.20.1 is supported (I'll make a 1.20.0 backport if anyone asks for it, and obviously this mod would be useless for prior versions).
