chore: moved behaviour collectors into subdirectory

Engine.Core/Collectors/BehaviourCollectorBase.cs

@@ -82,7 +82,6 @@ public abstract class BehaviourCollectorBase<T> : IBehaviourCollector<T> where T
         OnRemoved?.Invoke(this, new(tBehaviour));
     }
 
-
     private void OnUniverseObjectRegistered(IUniverse manager, IUniverse.UniverseObjectRegisteredArguments args)
     {
         IUniverseObject universeObject = args.UniverseObjectRegistered;