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/TweenVector3DExtensions.cs

@@ -4,6 +4,21 @@ namespace Engine.Systems.Tween;
 
 public static class TweenVector3DExtensions
 {
+    private static readonly BoxedPool<Vector3D> boxedVector3DPool = new(2);
+
     public static ITween TweenVector3D(this Vector3D initialVector3D, ITweenManager tweenManager, float duration, Vector3D targetVector3D, System.Action<Vector3D> setMethod)
-        => tweenManager.StartTween(duration, t => setMethod?.Invoke(initialVector3D.Lerp(targetVector3D, t)));
+    {
+        Boxed<Vector3D> boxedInitial = boxedVector3DPool.Get(initialVector3D);
+        Boxed<Vector3D> boxedTarget = boxedVector3DPool.Get(targetVector3D);
+
+        ITween tween = tweenManager.StartTween(duration, t => setMethod?.Invoke(boxedInitial.Value.Lerp(boxedTarget.Value, t)));
+
+        tween.OnComplete(() =>
+        {
+            boxedVector3DPool.Return(boxedInitial);
+            boxedVector3DPool.Return(boxedTarget);
+        });
+
+        return tween;
+    }
 }