Viewmodel caching WIP

Hyperbar.Windows.Primary/ConfigurationChangedHandler.cs

@@ -0,0 +1,11 @@
+namespace Hyperbar.Windows.Primary;
+
+public class ConfigurationChangedHandler :
+    INotificationHandler<ConfigurationChanged<PrimaryWidgetConfiguration>>
+{
+    public ValueTask Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification, 
+        CancellationToken cancellationToken)
+    {
+        throw new NotImplementedException();
+    }
+}