[Settings Tests] Migrate General Settings tests (#5753)

* added MSTest project

* migrated general settings tests

* enabled settings tests run in the build pipeline

* added tests

* move relay command class to separate file

* added a foldername parameter for general settings view model

src/core/Microsoft.PowerToys.Settings.UI.UnitTests/ModelsTests/BasePTSettingsTest.cs

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.PowerToys.Settings.UI.Lib;
+
+namespace Microsoft.PowerToys.Settings.UnitTest
+{
+    public class BasePTSettingsTest : BasePTModuleSettings
+    {
+        public BasePTSettingsTest()
+        {
+            Name = string.Empty;
+            Version = string.Empty;
+        }
+    }
+}