(BREAKING) Add AnimatorAsCode V1:

- Breaking changes:
  - Remove dependency to VRChat in the AnimatorAsCode.V1 namespace. The namespace should now be usable in non-VRChat projects.
  - All VRChat-specific methods are now extension functions in a separate namespace, AnimatorAsCode.V1.VRC.
  - VRChat methods that modify existing assets are split into a separate namespace, AnimatorAsCode.V1.VRCDestructiveWorkflow.
- Breaking fixes:
  - Fix incorrect type signature on AacFlFloatParameterGroup.ToList() and AacFlIntParameterGroup.ToList().
- Add AacFlBase.NewBlendTree():
  - This allows creating blend trees as code.
  - Add AacFlState.WithAnimation(AacFlBlendTree).
- Add AacFlBase.NoAnimator():
  - This can be used to obtain AacFlParameter objects for use in the generation of BlendTrees and other systems, without requiring the existence of a backing animator controller.
  - This can also be used in some cases where there are type casts (Bool to Float, Float to Bool).
- Add AacFlBase.NewAnimatorController():
  - This is meant to be used for non-destructive workflows.
  - This creates an animator controller inside the asset container. This animator controller will be reaped in the same way as other assets are reaped.

Framework/Editor/V1/AacFlStates.cs

@@ -7,7 +7,7 @@ using UnityEngine;
 // ReSharper disable once CheckNamespace
 namespace AnimatorAsCode.V1
 {
-    internal class AacBackingAnimator
+    public class AacBackingAnimator
     {
         private readonly AacAnimatorGenerator _generator;
 
@@ -134,7 +134,7 @@ namespace AnimatorAsCode.V1
             _childNodes = new List<AacAnimatorNode>();
         }
 
-        internal AacBackingAnimator BackingAnimator()
+        public AacBackingAnimator InternalBackingAnimator()
         {
             return _backingAnimator;
         }
@@ -332,6 +332,12 @@ namespace AnimatorAsCode.V1
             return this;
         }
 
+        public AacFlState WithAnimation(AacFlBlendTree blendTree)
+        {
+            State.motion = blendTree.BlendTree;
+            return this;
+        }
+
         public AacFlTransition TransitionsTo(AacFlState destination)
         {
             return new AacFlTransition(ConfigureTransition(State.AddTransition(destination.State)), _machine, State, destination.State);