perf: improved networking code to use the new events

Shared/Behaviours/PaddleBehaviour.cs

@@ -71,7 +71,7 @@ public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Sp
             rigidBody.Velocity = Vector2D.Zero;
     }
 
-    public void OnServerPacketArrived(PaddleKeyStatePacket packet, string from)
+    public void OnServerPacketArrived(string sender, PaddleKeyStatePacket packet)
     {
         isUpPressed = packet.IsUpPressed;
         isDownPressed = packet.IsDownPressed;