Add project files.

ModVersionChecker/data/model/AppStatus.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ModVersionChecker.data.model
+{
+    public enum AppStatus
+    {
+        None,
+        UpdateAvailable,
+        Error,
+    }
+}