refactor: delegate names updated to have no "On" prefix

Engine.Core/Abstract/INameable.cs

@@ -8,12 +8,12 @@ public interface INameable
     /// <summary>
     /// Event triggered when the name of the entity changes.
     /// </summary>
-    event OnNameChangedEventHandler? OnNameChanged;
+    event NameChangedEventHandler? OnNameChanged;
 
     /// <summary>
     /// The name of the entity.
     /// </summary>
     string Name { get; set; }
 
-    delegate void OnNameChangedEventHandler(INameable sender, string previousName);
+    delegate void NameChangedEventHandler(INameable sender, string previousName);
 }