support collisions & restructure transforms to only update once per frame

lib/filament_controller.dart

@@ -538,4 +538,11 @@ abstract class FilamentController {
 
   Future<EntityTransformController> control(FilamentEntity entity,
       {double? translationSpeed, String? forwardAnimation});
+
+  ///
+  /// Make [collidableEntity] collidable.
+  /// At the moment, this is only relevant when controlling a different entity's transform.
+  /// If there is a collision between the controlled entity and [collidableEntity], the transform will not be updated.
+  ///
+  Future addCollisionComponent(FilamentEntity collidableEntity);
 }

lib/filament_controller_ffi.dart

@@ -1358,4 +1358,13 @@ class FilamentControllerFFI extends FilamentController {
     _keyboardListener = HardwareKeyboardListener(transformController);
     return transformController;
   }
+
+  @override
+  Future addCollisionComponent(FilamentEntity entity) async {
+    if (_assetManager == null) {
+      throw Exception("AssetManager must be non-null");
+    }
+
+    add_collision_component(_assetManager!, entity);
+  }
 }

lib/generated_bindings.dart

@@ -828,6 +828,13 @@ external void flutter_filament_free(
   ffi.Pointer<ffi.Void> ptr,
 );
 
+@ffi.Native<ffi.Void Function(ffi.Pointer<ffi.Void>, EntityId)>(
+    symbol: 'add_collision_component', assetId: 'flutter_filament_plugin')
+external void add_collision_component(
+  ffi.Pointer<ffi.Void> assetManager,
+  int entityId,
+);
+
 @ffi.Native<
         ffi.Pointer<ffi.Void> Function(
             ffi.Pointer<ffi.Void>,