feat: implemented point primitive gizmo

modules/terrain_editor/point_primitive_node.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "scene/3d/node_3d.h"
+#include "terrain_editor/terrain_primitive.h"
+
+class PointPrimitiveNode : public Node3D {
+	GDCLASS(PointPrimitiveNode, Node3D);
+	static void _bind_methods();
+	void on_underlying_changed();
+
+protected:
+	void _notification(int what);
+
+public:
+	void push_transform_changes();
+	void set_primitive(Ref<PointPrimitive> primitive);
+	Ref<PointPrimitive> get_primitive() const;
+
+private:
+	bool pushing_change{ false };
+	Ref<PointPrimitive> primitive{};
+	Callable underlying_changed_callable{ callable_mp(this, &self_type::on_underlying_changed) };
+};