Fabric API – [23w33a] Fabric API 0.87.1+1.20.2

– 23w33a (modmuss50)
– Misc networking API cleanup + fixes (#3265) (modmuss)
– Bump version (modmuss50)
– Improve Indigo and FRAPI Test Mod (#3208) (PepperCode1)
– Make DFU error-tolerant to mod custom generator types (#3213) (qouteall)
– Make deprecated modules opt-out instead of opt-in (#3246) (modmuss, Juuz)
– Fix #3255 (#3257) (modmuss)
– Fix createAndPopulateRegistryMap() always returning null, preventing registry sync. (modmuss50)
– Fix publishMods dryRun (modmuss50)