Continue working on level manager split

CoroutineUtils.cs

@@ -38,5 +38,13 @@ namespace NEG.Utils
             yield return null;
             action?.Invoke();
         }
+
+        public static void ActionAfterTime(this MonoBehaviour mono, float time, Action action) => mono.StartCoroutine(ActionAfterTime(time, action));
+
+        public static IEnumerator ActionAfterTime(float time, Action action)
+        {
+            yield return new WaitForSeconds(time);
+            action?.Invoke();
+        }
     }
 }