feat: re-implement (native) Gizmo class, expose preserveScaling parameter for setParent, add methods for getting viewport bounding box from renderable entity

thermion_dart/native/include/Gizmo.hpp

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <utils/Entity.h>
+#include <filament/Engine.h>
+#include <filament/Material.h>
+#include <filament/MaterialInstance.h>
+#include <filament/Scene.h>
+#include <filament/Camera.h>
+#include <filament/View.h>
+
+#include <gltfio/AssetLoader.h>
+#include <gltfio/FilamentAsset.h>
+#include <gltfio/FilamentInstance.h>
+#include <gltfio/ResourceLoader.h>
+
+#include <filament/IndexBuffer.h>
+#include <filament/InstanceBuffer.h>
+
+#include "material/gizmo.h"
+
+#include "Aabb2.h"
+
+using namespace filament;
+using namespace utils;
+
+
+class Gizmo { 
+    public:
+        Gizmo(Engine* const engine);
+        void updateTransform();
+        void destroy(Engine* const engine);
+        Entity x() {
+            return _entities[0];
+        };
+        Entity y() {
+            return _entities[1];
+        };
+        Entity z() {
+            return _entities[2];
+        };
+        Entity center() {
+            return _entities[3];
+        };
+    private:
+        utils::Entity _entities[4];
+        Material* _material;
+        MaterialInstance* _materialInstances[4];
+};