refactor: move routing interfaces into their own files

src/PepperDash.Essentials.Core/Routing/IRoutingOutputs.cs

@@ -0,0 +1,19 @@
+using PepperDash.Core;
+
+
+namespace PepperDash.Essentials.Core
+{
+    /// <summary>
+    /// Defines a class that has a collection of RoutingOutputPorts
+    /// </summary>
+
+    public interface IRoutingOutputs : IKeyed
+	{
+		RoutingPortCollection<RoutingOutputPort> OutputPorts { get; }
+	}
+
+/*    public interface IRoutingOutputs<TSelector> : IKeyed
+    {
+        RoutingPortCollection<RoutingOutputPort<TSelector>, TSelector> OutputPorts { get; }
+    }*/
+}