Wrap FluentAvalonia controls within same named classes allowing us to declare the xmlns namespace in our assembly

Framework/Avalonia/Markups/TriggerCollection.cs

@@ -0,0 +1,15 @@
+using System.Collections.ObjectModel;
+
+namespace Toolkit.Foundation.Avalonia
+{
+    public class TriggerCollection : Collection<Delegate>
+    {
+        public void Add(object item)
+        {
+            if (item is Delegate trigger)
+            {
+                base.Add(trigger);
+            }
+        }
+    }
+}