Improve integration with Live2D assets

- Added container-independent method for searching AnimationClip assets
(However, it's not really universal, so it can't completely replace the container-dependent method)

AssetStudio/AssetsManager.cs

@@ -74,6 +74,11 @@ namespace AssetStudio
                 filteredAssetTypesList.Add(ClassIDType.Texture2D);
                 filteredAssetTypesList.Add(ClassIDType.SpriteAtlas);
             }
+            if (classIDTypes.Contains(ClassIDType.Animator))
+            {
+                filteredAssetTypesList.Add(ClassIDType.AnimatorController);
+                filteredAssetTypesList.Add(ClassIDType.AnimatorOverrideController);
+            }
 
             filteredAssetTypesList.UnionWith(classIDTypes);
         }

AssetStudio/CubismModel.cs

@@ -15,6 +15,7 @@ namespace AssetStudio
         public List<MonoBehaviour> ParamDisplayInfoList { get; set; }
         public List<MonoBehaviour> PartDisplayInfoList { get; set; }
         public List<MonoBehaviour> PosePartList { get; set; }
+        public List<AnimationClip> ClipMotionList { get; set; }
         public GameObject ModelGameObject { get; set; }
 
         public CubismModel(GameObject m_GameObject)
@@ -26,6 +27,7 @@ namespace AssetStudio
             ParamDisplayInfoList = new List<MonoBehaviour>();
             PartDisplayInfoList = new List<MonoBehaviour>();
             PosePartList = new List<MonoBehaviour>();
+            ClipMotionList = new List<AnimationClip>();
         }
     }
 }