The interface for adding built-in resource packs

[aratakileo]

It is an analog to Fabric's:

ResourceManagerHelper.registerBuiltinResourcePack(...);

and to Quilt's:

ResourceLoader.registerBuiltinResourcePack(...);

In the first case, the code depends on the Fabric API, in the second on the Quilt API. This implementation is independent of either. This implementation can also be easily scaled to Forge and Neogorge