added imgui and config file to project

include/gmenu.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "gconfig.h"
+#include "gwindow.h"
+#include "logger.h"
+
+class GMenu {
+public:
+  GMenu(Logger *l, GWindow *w, GConfig *c) : logger(l), window(w), config(c) {};
+  ~GMenu() {};
+
+  void init();
+  void update();
+  void default_menu();
+
+private:
+  Logger *logger;
+  GWindow *window;
+  GConfig *config;
+};