refactor: switched from universe objects to behaviours on all managers like update, draw & physics etc.

Engine.Core/CoroutineManager.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 
 namespace Syntriax.Engine.Core;
 
-public class CoroutineManager : UniverseObject
+public class CoroutineManager : Behaviour
 {
     private readonly List<IEnumerator> enumerators = [];
 
@@ -18,12 +18,12 @@ public class CoroutineManager : UniverseObject
         enumerators.Remove(enumerator);
     }
 
-    protected override void OnEnteringUniverse(IUniverse universe)
+    protected override void OnEnteredUniverse(IUniverse universe)
     {
         universe.OnUpdate.AddListener(OnUpdate);
     }
 
-    protected override void OnExitingUniverse(IUniverse universe)
+    protected override void OnExitedUniverse(IUniverse universe)
     {
         universe.OnUpdate.RemoveListener(OnUpdate);
     }