Customizable Player Models

24w03b port
Fixed crash with First Person Model (Closes #550)
Fixed crash with Iris/Oculus and Entity Culling (Closes #531)
Fixed glowing eyes not working on placed player heads with Iris/Oculus
Fixed Optifine GL error with color cubes
Fixed glowing cubes rendering behind with first person model and Iris/Oculus (Closes #494)

Fixed Iris crash on 1.20.4 (Closes #544)
Fixed instant disconnect with bukkit servers on 1.20.4
Fixed reach attribute scaling on 1.20.2 NeoForge