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`+` Plugin is now a Mythic add-on and depends on MythicMobs

`+` Updated to support 1.21.3 and 1.21.4 (emotes currently broken, though)

`+` Dropped support for all versions before 1.21.3

`+` Updated to use ModelEngine 4

`+` Added support to load cosmetics from Mythic packs using folder structure `PACK/cosmetics/hats` etc

`+` Added support for Crucible implicit generation for hats and other equippabless

Updated to latest LumineUtils

# Conflicts:
#	plugin/src/main/java/io/lumine/cosmetics/MCCosmeticsPlugin.java

Use correct 1.19.3 nms version

See merge request !1