perf: regular events to custom events

Engine.Physics2D/Abstract/IPhysicsEngine2D.cs

@@ -1,3 +1,5 @@
+using Syntriax.Engine.Core;
+
 namespace Syntriax.Engine.Physics2D;
 
 /// <summary>
@@ -8,12 +10,12 @@ public interface IPhysicsEngine2D
     /// <summary>
     /// Event triggered when the <see cref="IPhysicsEngine2D"/> has done a single physics iteration.
     /// </summary>
-    event PhysicsIterationEventHandler? OnPhysicsIteration;
+    Event<IPhysicsEngine2D, float> OnPhysicsIteration { get; }
 
     /// <summary>
     /// Event triggered when the <see cref="IPhysicsEngine2D"/> has done a full physics step/>.
     /// </summary>
-    event PhysicsStepEventHandler? OnPhysicsStep;
+    Event<IPhysicsEngine2D, float> OnPhysicsStep { get; }
 
     /// <summary>
     /// The number of iterations the <see cref="IPhysicsEngine2D"/> performs per step.