feat: version 1.21

[atomic-junky]

Support for directory name changes:

structures -> structure
advancements -> advancement
recipes -> recipe
loot_tables -> loot_table
predicates -> predicate
item_modifiers ->item_modifier
functions -> function
tags/functions -> tags/function
tags/items-> tags/item
tags/blocks-> tags/block
tags/entity_types -> tags/entity_type
tags/fluids -> tags/fluid
tags/game_events-> tags/game_event

[TheNuclearNexus]

These changes break the ability to load packs made for older versions of Minecraft completely
Also, according to the wiki only tags/functions was changed, other tags were unaffected

[atomic-junky]

That's not what I understood, I saw it in the wiki too

[TheNuclearNexus]

Ah ok must have missed it, do you know which snapshot it was?

[atomic-junky]

It seams to be 24w19a according to this video of slicelime https://www.youtube.com/watch?v=AJTSOwlsgwk

[rx-dev]

Superceded by 1.21 support (#422)