VRC behaviors to work on both States and SSM's.

All VRC-specific behavior helpers are now extension
functions that can be called using AacAnimatorNode

Examples/GenExample3_Gesturing.cs

@@ -1,6 +1,7 @@
 #if UNITY_EDITOR
 using System.Linq;
 using AnimatorAsCode.V0;
+using AnimatorAsCode.V0.Extensions.VRChat;
 using UnityEngine;
 using VRC.SDK3.Avatars.Components;
 using UnityEditor;