Port to 1.21.1 (against all odds, it lives)

[qrmcat]

WE BALL

....3/4 of all this code was written at like, 3 am or so, possibly drunk once or twice, plus ontop of that I used a script I had lying around that helped port the braindead things, and of course a bit of help from LLMs when my brain died.
So expect crimes.. like a lot of crimes
But, it in fact works, somehow.

okay I assume everyone would actually want to know what in the absolute hell changed here so..:

• every item detail provider (potions, containers, banners, books, armor, computers, turtles, pockets, media) got rewritten to read components instead of nbt. the neural interface save/load is all components now. recipes and advancements regenerate in the new format, and the turtle/pocket
• upgrades are datagen'd as dynamic registry entries. mixins got updated for the new 1.21 signatures, and the fake player attribute handling moved to the component api.
• media item recordTitle/recordName is gone since 1.21 wants a registry the meta system doesn't have (someone correct me if i'm wrong though!)

[EmmaKnijn]

This is currently in the staging pack pending more testing, will merge if it works well