use decompose/composeMatrix for transforms and add mouse controls for rotation

lib/widgets/entity_controller_mouse_widget.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_filament/entities/entity_transform_controller.dart';
+
+///
+/// A widget that translates mouse gestures to zoom/pan/rotate actions.
+///
+class EntityTransformMouseControllerWidget extends StatelessWidget {
+  final EntityTransformController? transformController;
+  final Widget? child;
+
+  const EntityTransformMouseControllerWidget(
+      {Key? key, required this.transformController, this.child})
+      : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Listener(
+        onPointerHover: (event) {
+          transformController?.look(event.delta.dx);
+        },
+        child: child);
+  }
+}