refactor: Actions to Delegates

Engine.Core/Abstract/IBehaviour.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Syntriax.Engine.Core.Abstract;
 
 /// <summary>
@@ -10,7 +8,7 @@ public interface IBehaviour : IEntity, IAssignableBehaviourController, IAssignab
     /// <summary>
     /// Event triggered when the priority of the <see cref="IBehaviour"/> changes.
     /// </summary>
-    Action<IBehaviour>? OnPriorityChanged { get; set; }
+    event OnPriorityChangedDelegate? OnPriorityChanged;
 
     /// <summary>
     /// The priority of the <see cref="IBehaviour"/>.
@@ -21,4 +19,6 @@ public interface IBehaviour : IEntity, IAssignableBehaviourController, IAssignab
     /// The value indicating whether the <see cref="IBehaviour"/> is active.
     /// </summary>
     bool IsActive { get; }
+
+    delegate void OnPriorityChangedDelegate(IBehaviour sender, int previousPriority);
 }