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/TweenPrimitiveExtensions.cs

@@ -0,0 +1,41 @@
+using Engine.Core;
+
+namespace Engine.Systems.Tween;
+
+public static class TweenPrimitiveExtensions
+{
+    private static readonly BoxedPool<float> boxedFloatPool = new(2);
+    private static readonly BoxedPool<int> boxedIntPool = new(2);
+
+    public static ITween TweenFloat(this float initialFloat, ITweenManager tweenManager, float duration, float targetFloat, System.Action<float> setMethod)
+    {
+        Boxed<float> boxedInitial = boxedFloatPool.Get(initialFloat);
+        Boxed<float> boxedTarget = boxedFloatPool.Get(targetFloat);
+
+        ITween tween = tweenManager.StartTween(duration, t => setMethod?.Invoke(boxedInitial.Value.Lerp(boxedTarget.Value, t)));
+
+        tween.OnComplete(() =>
+        {
+            boxedFloatPool.Return(boxedInitial);
+            boxedFloatPool.Return(boxedTarget);
+        });
+
+        return tween;
+    }
+
+    public static ITween TweenInt(this int initialInt, ITweenManager tweenManager, float duration, int targetInt, System.Action<float> setMethod)
+    {
+        Boxed<int> boxedInitial = boxedIntPool.Get(initialInt);
+        Boxed<int> boxedTarget = boxedIntPool.Get(targetInt);
+
+        ITween tween = tweenManager.StartTween(duration, t => setMethod?.Invoke(boxedInitial.Value + (boxedTarget.Value - boxedInitial.Value) * t));
+
+        tween.OnComplete(() =>
+        {
+            boxedIntPool.Return(boxedInitial);
+            boxedIntPool.Return(boxedTarget);
+        });
+
+        return tween;
+    }
+}