[Feature Request] Ability to register custom renderers for vanilla armor with specific custom model data

[RazorPlay01]

As the title says, the idea is to be able to register custom renderers for vanilla armor with x custom model data. This way, you could easily customize something like what azurelib does.

[Tslat]

This wouldn't be terribly hard to do, but it would involve creating an entire specification on the custom data and how it's used

It may be better suited to a GeckoLib addon maybe?