feat: implemented point primitive gizmo

modules/terrain_editor/terrain_mesh_editor.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "terrain_editor/terrain_mesh_generator.h"
+
+class TerrainMeshEditor : public TerrainMeshGenerator {
+	GDCLASS(TerrainMeshEditor, TerrainMeshGenerator);
+	static void _bind_methods();
+	void ready();
+	void on_primitive_list_changed(Array primitives);
+	void on_primitive_node_removed();
+
+protected:
+	void _notification(int what);
+	void set_point_primitive_object(Ref<PackedScene> scene);
+	Ref<PackedScene> get_point_primitive_object() const;
+
+private:
+	Vector<Node3D *> primitive_nodes{};
+	Ref<PackedScene> point_primitive_object{};
+};