Add initial main menu class

c_os/user/MainMenu.cc

@@ -0,0 +1,7 @@
+#include "user/MainMenu.h"
+
+void MainMenu::run() {
+    kout << "Main Menu" << endl;
+
+    scheduler.exit();
+}

c_os/user/MainMenu.h

@@ -0,0 +1,19 @@
+#ifndef __MainMenu_Inlucde_H_
+#define __MainMenu_Inlucde_H_
+
+#include "kernel/threads/Thread.h"
+#include "kernel/Globals.h"
+
+class MainMenu : public Thread {
+private:
+    MainMenu(const MainMenu& copy) = delete;
+
+public:
+    MainMenu() {
+        kout << "MainMenu initialized" << endl;
+    }
+
+    void run() override;
+};
+
+#endif