perf: improved garbage created by tweens slightly

They still do generate a lot of garbage but with boxed value pools I made the boxes reusable, it still does generate garbage through the delegate creation, gotta find a solution for them later

Engine.Systems/Tween/EngineExtensions/TweenVector2DExtensions.cs

@@ -4,6 +4,21 @@ namespace Engine.Systems.Tween;
 
 public static class TweenVector2DExtensions
 {
+    private static readonly BoxedPool<Vector2D> boxedVector2DPool = new(2);
+
     public static ITween TweenVector2D(this Vector2D initialVector2D, ITweenManager tweenManager, float duration, Vector2D targetVector2D, System.Action<Vector2D> setMethod)
-        => tweenManager.StartTween(duration, t => setMethod?.Invoke(initialVector2D.Lerp(targetVector2D, t)));
+    {
+        Boxed<Vector2D> boxedInitial = boxedVector2DPool.Get(initialVector2D);
+        Boxed<Vector2D> boxedTarget = boxedVector2DPool.Get(targetVector2D);
+
+        ITween tween = tweenManager.StartTween(duration, t => setMethod?.Invoke(boxedInitial.Value.Lerp(boxedTarget.Value, t)));
+
+        tween.OnComplete(() =>
+        {
+            boxedVector2DPool.Return(boxedInitial);
+            boxedVector2DPool.Return(boxedTarget);
+        });
+
+        return tween;
+    }
 }