Enabling StyleCop for folder plugin (#5844)

src/modules/launcher/Plugins/Microsoft.Plugin.Folder/FolderSettings.cs

@@ -0,0 +1,15 @@
+// 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 System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace Microsoft.Plugin.Folder
+{
+    public class FolderSettings
+    {
+        [JsonProperty]
+        public List<FolderLink> FolderLinks { get; } = new List<FolderLink>();
+    }
+}