Improve RuntimeUtil.IsAvatarRoot()

[kaikoga]

ndmf/Runtime/RuntimeUtil.cs

Lines 95 to 105 in 2d0357f

	public static bool IsAvatarRoot(Transform target)
	{
	#if NDMF_VRCSDK3_AVATARS
	return target.GetComponent<VRCAvatarDescriptor>();
	#else
	var an = target.GetComponent<Animator>();
	if (!an) return false;
	var parent = target.transform.parent;
	return !(parent && parent.GetComponentInParent<Animator>());
	#endif
	}

as-is

• VRCSDK project: true for VRC avatars, false for non-VRC avatars
• non-VRCSDK project: true for VRC and non-VRC avatars

to-be

• VRCSDK projects should be able to handle non-VRC avatars, but not lenient enough to treat all Animators as avatars
• Something like...?
  • If any avatar platform is detected (for example, VRCSDK and/or uniVRM), iterate through all platform specific checks
  • Else, fallback to Animator heuristic (current non-VRC implementation)