What's New:

• Port to Minecraft 1.21.10

ExtraCodecs

This port removes fromJsonSerializer and other JsonSerializer related methods, as JsonSerializer is no longer a thing.

ReloaderType

Removed TagManager and LootDataManager types, as those were moved to dynamic registries.

SavedData

Removed SavedDataHelper, as SavedData was refactored into using datafixerupper codecs, making this class obsolete.

Additionally, Fabric provides a data attachment API, which is a (better) replacement for those classes.