Initialize basic game

Signed-off-by: Daniel Henry <iamdanhenry@gmail.com>

include/Pong.h

@@ -0,0 +1,7 @@
+#pragma once
+#include <Craft.h>
+
+class PongWorld : public craft::World {
+  void Begin() override;
+  void Tick(float deltaTime) override;
+};