Add project files.

ObservatoryCore/UI/ViewModels/NotificationViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Observatory.UI.ViewModels
+{
+    public class NotificationViewModel : ViewModelBase
+    {
+        public NotificationViewModel(string title, string detail)
+        {
+            Notification = new() { Title = title, Detail = detail };
+        }
+
+        public Models.NotificationModel Notification;
+    }
+}