feat: add clearMorphAnimationData function

thermion_dart/lib/thermion_dart/compatibility/native/thermion_dart.g.dart

@@ -368,6 +368,12 @@ external bool set_morph_animation(
   double frameLengthInMs,
 );
 
+@ffi.Native<ffi.Void Function(ffi.Pointer<ffi.Void>, ffi.Int)>()
+external void clear_morph_animation(
+  ffi.Pointer<ffi.Void> sceneManager,
+  int entity,
+);
+
 @ffi.Native<ffi.Void Function(ffi.Pointer<ffi.Void>, ffi.Int)>()
 external void reset_to_rest_pose(
   ffi.Pointer<ffi.Void> sceneManager,

thermion_dart/lib/thermion_dart/compatibility/web/interop/thermion_viewer_dart_bridge.dart

@@ -226,6 +226,11 @@ class ThermionViewerJSDartBridge {
           .then((v) => v.toJS)
           .toJS;
 
+  @JSExport()
+  void clearMorphAnimationData(ThermionEntity entity) {
+    viewer.clearMorphAnimationData(entity);
+  }
+
   @JSExport()
   JSPromise setMorphAnimationData(
       ThermionEntity entity,

thermion_dart/lib/thermion_dart/compatibility/web/interop/thermion_viewer_js.dart

@@ -263,6 +263,11 @@ class ThermionViewerJS implements ThermionViewer {
         .toDartDouble;
   }
 
+  @override
+  Future<void> clearMorphAnimationData(ThermionEntity entity) async {
+    _shim.clearMorphAnimationData(entity);
+  }
+
   @override
   Future<void> setMorphAnimationData(
       ThermionEntity entity, MorphAnimationData animation,

thermion_dart/lib/thermion_dart/compatibility/web/interop/thermion_viewer_js_shim.dart

@@ -6,11 +6,10 @@ import 'dart:js_interop';
 import 'package:thermion_dart/thermion_dart/thermion_viewer.dart';
 
 ///
-/// An extension type on [JSObject] that represents a 
+/// An extension type on [JSObject] that represents a
 /// Javascript shim implementation of the [ThermionViewer] interface.
-/// 
+///
 extension type ThermionViewerJSShim(JSObject _) implements JSObject {
-  
   @JS('initialized')
   external JSPromise<JSBoolean> get initialized;
 
@@ -136,6 +135,9 @@ extension type ThermionViewerJSShim(JSObject _) implements JSObject {
   external JSPromise<JSNumber> getAnimationDuration(
       ThermionEntity entity, int animationIndex);
 
+  @JS('clearMorphAnimationData')
+  external void clearMorphAnimationData(ThermionEntity entity);
+
   @JS('setMorphAnimationData')
   external JSPromise setMorphAnimationData(
       ThermionEntity entity,
@@ -403,19 +405,16 @@ extension type ThermionViewerJSShim(JSObject _) implements JSObject {
       ThermionEntity entity, JSArray<JSNumber> transform);
 
   @JS('setBoneTransform')
-  external JSPromise setBoneTransform(
-      ThermionEntity entity, int boneIndex, JSArray<JSNumber> transform, int skinIndex);
-  
+  external JSPromise setBoneTransform(ThermionEntity entity, int boneIndex,
+      JSArray<JSNumber> transform, int skinIndex);
+
   @JS('setShadowsEnabled')
-  external JSPromise setShadowsEnabled(
-      bool enabled);
+  external JSPromise setShadowsEnabled(bool enabled);
 
   @JS('setShadowType')
-  external JSPromise setShadowType(
-      int shadowType);
+  external JSPromise setShadowType(int shadowType);
 
   @JS('setSoftShadowOptions')
   external JSPromise setSoftShadowOptions(
       double penumbraScale, double penumbraRatioScale);
 }
-

thermion_dart/lib/thermion_dart/compatibility/web/interop/thermion_viewer_wasm.dart

@@ -788,6 +788,27 @@ class ThermionViewerWasm implements ThermionViewer {
         null);
   }
 
+  @override
+  Future clearMorphAnimationData(
+      ThermionEntity entity) async {
+    var meshEntities = await getChildEntities(entity, false);
+    for(final childEntity in meshEntities) {
+          _module.ccall(
+            "clear_morph_animation",
+            "void",
+            [
+              "void*".toJS,
+              "int".toJS,
+            ].toJS,
+            [
+              _sceneManager!,
+              childEntity.toJS,
+            ].toJS,
+            null);
+    }
+
+  }
+
   @override
   Future setMorphAnimationData(
       ThermionEntity entity, MorphAnimationData animation,