add Commands API#11

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SpaceWalkerRS wants to merge 5 commits intomainfrom

module/commands

Commits on Aug 1, 2023

add command registration event
SpaceWalkerRS
committed

Commits on Aug 2, 2023

Commits on Aug 14, 2023

brigadier impl for 1.12 (WIP)
SpaceWalkerRS
committed

Commits on Aug 17, 2023

move server command setup to server start (was server ready)
SpaceWalkerRS
committed