wippatern_preview: Adding patern preview

This adds a preview of the patern placement, checking out of bound

includes/paterns_menu.hpp

@@ -30,6 +30,7 @@ private:
   std::shared_ptr<ctx> context_ = nullptr;
   std::map<std::string,std::string> paterns_paths_list_;
   std::vector<std::string> paterns_name_list_;
+public:
   int patern_width_ = 0;
   int patern_height_ = 0;
   std::vector<uint32_t> loaded_patern_;