fix: BehaviourController Manual AddBehaviour Assign Exceptions

Engine.Core/BehaviourController.cs

@@ -32,6 +32,9 @@ public class BehaviourController : IBehaviourController
     {
         InsertBehaviourByPriority(behaviour);
 
+        behaviour.Assign(this);
+        behaviour.Assign(GameObject.StateEnable);
+
         behaviour.Initialize();
         behaviour.OnPriorityChanged += OnPriorityChange;
         OnBehaviourAdded?.Invoke(this, behaviour);