add new struct and events

src/layer/layer.hpp

@@ -1,14 +1,12 @@
 #pragma once
 
 #include "event/event.hpp"
-#include "gui/flags.hpp"
+#include "utils/using.hpp"
 
 namespace VE 
 {
-  class layer : public flags
+  class layer
   {
-    using time = time::timestep<float>;
-
     public:
       layer() = default;
       virtual ~layer() = default;