patern_preview/world: Place selection into the world

includes/patern_preview.hpp

@@ -27,6 +27,7 @@ private:
   bool is_started = false;
   std::shared_ptr<ctx> context_;
   Vector2 mouse_pos_ = {0, 0};
+  bool is_unplacable_ = false;
 };
 
 } // namespace gol

includes/world.hpp

@@ -37,6 +37,7 @@ public:
   void setCell(int x, int y);
   void resize(int width, int height); // destructive
   std::vector<uint32_t> getSelection(Vector2i &origin, Vector2i &size);
+  void setSelection(Vector2i &origin, Vector2i &size, std::vector<uint32_t> &data);
 
   // Private members
 private: