Add Event system

- Add abstract Event class
- Add EventDispatcher
- Add Mouse, Key and Window Events

CopiumEngine/src/copium/main.cpp

@@ -1,5 +1,6 @@
 #include "copium/core/Application.h"
 #include "copium/core/Vulkan.h"
+#include "copium/event/EventDispatcher.h"
 #include "copium/util/Common.h"
 #include "copium/util/Timer.h"
 
@@ -17,6 +18,7 @@ int main(int argc, char** argv)
     while (application.Update())
     {
       glfwPollEvents();
+      Copium::EventDispatcher::Dispatch();
       if (timer.Elapsed() >= 1.0)
       {
         CP_DEBUG("%d fps", frames);