Add project files.

Framework/Avalonia/Routing/NavigateHandler.cs

@@ -0,0 +1,19 @@
+using TheXamlGuy.Framework.Core;
+
+namespace TheXamlGuy.Framework.Avalonia
+{
+    public class NavigateHandler : IMediatorHandler<Navigate>
+    {
+        private readonly IEventAggregator eventAggregator;
+
+        public NavigateHandler(IEventAggregator eventAggregator)
+        {
+            this.eventAggregator = eventAggregator;
+        }
+
+        public void Handle(Navigate request)
+        {
+            eventAggregator.Publish(request);
+        }
+    }
+}