Fabric API – [23w17a] Fabric API 0.80.0+1.20

– Fix checkstyle after merge. (modmuss50)
– Bump version (modmuss50)
– Split test mods into client and common. (#3033) (modmuss50)
– Add a Fake Player API (#3005) (Technici4n)
– [1.20] Remove deprecated NbtRegistryPacketHandler (#3026) (modmuss50)