씬 전환을 위한 씬매니저 추가 및 씬 전환 기능 추가

Assets/Scripts/Managers/Managers.cs

@@ -7,9 +7,11 @@ public class Managers : MonoBehaviour
     
     InputManager _input = new InputManager();
     ResourceManager _resource = new ResourceManager();
+    SceneManagerEx _scene =  new SceneManagerEx();
     UIManager _ui = new UIManager();
     public static InputManager Input { get { return Instance._input; } }
     public static ResourceManager Resource { get { return Instance._resource; } }
+    public static SceneManagerEx Scene { get { return Instance._scene; } }
     public static UIManager UI { get { return Instance._ui; } }
     
     // Start is called once before the first execution of Update after the MonoBehaviour is created