feat: IActive interface added for hierarchy active state

Engine.Core/BehaviourController.cs

@@ -124,12 +124,14 @@ public class BehaviourController : IBehaviourController
         OnBehaviourRemoved?.Invoke(this, behaviour);
     }
 
+    protected virtual void OnAssign(IHierarchyObject hierarchyObject) { }
     public bool Assign(IHierarchyObject hierarchyObject)
     {
         if (HierarchyObject is not null && HierarchyObject.IsInitialized)
             return false;
 
         _hierarchyObject = hierarchyObject;
+        OnAssign(hierarchyObject);
         OnHierarchyObjectAssigned?.Invoke(this);
         return true;
     }