Fabric API – [1.21-pre4] Fabric API 0.100.0+1.21

– Bump version (modmuss50)
– 1.21-pre4 (modmuss50)
– Configuration networking improvements (#3832) (modmuss, Octol1ttle)
– Add API to control creative inventory screen (#3814) (modmuss, haykam821)
– Add Mangrove Swamp and Bamboo Jungle to Dense Overworld Vegetation tag (#3839) (TelepathicGrunt)
– Rename FabricBlockLootTableProvider.registryLookup to stop hiding the protected vanilla field. (#3841) (modmuss)
– Port Model Loading API v1 to 1.21 (#3824) (PepperCode1)
– Use identifier path composition methods (#3820) (haykam821)
– Tag cleanup and additions for 1.21 (#3807) (TelepathicGrunt)