TargetFramework update,

reference updates and added tests for Viewer

Shared/Models/Stateless/IAppSettingsController.cs

@@ -0,0 +1,15 @@
+namespace OI.Metrology.Shared.Models.Stateless;
+
+public interface IAppSettingsController<T>
+{
+
+    enum Action : int
+    {
+        App = 0,
+        DevOps = 1
+    }
+
+    static string GetRouteName() => nameof(IAppSettingsController<T>)[1..^10];
+    T GetAppSettings();
+
+}