complete refactoring and cleanup old layout loading code

engine/app.hpp

@@ -3,6 +3,7 @@
 #include "shader.hpp"
 #include "shape.hpp"
 #include "texture.hpp"
+#include "layout.h"
 
 class App
 {
@@ -11,13 +12,8 @@ class App
     Shader shader_color;
     Shader shader_uv;
     Plane plane;
-    std::vector<std::unique_ptr<Shape>> shapes_list;
-    Circle circle, circle2, circle3, circle4;
-    Rounded rounded;
-    Slice9 slice;
     Texture2D tex;
-    YGNodeRef y_root { nullptr };
-    struct stat g_file_info { 0 };
+    Node layout;
 public:
     static App I;
     float width;
@@ -29,6 +25,4 @@ public:
     void mouse_down(int button, float x, float y);
     void mouse_move(float x, float y);
     void mouse_up(int button, float x, float y);
-    void update_layout();
-    void load_layout();
 };