added stylecop (#1933)

* added stylecop

* removed xml documentation

* used common stylecop file

src/core/Microsoft.PowerToys.Settings.UI.Lib/SndPowerPreviewSettings.cs

@@ -0,0 +1,29 @@
+// 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;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Microsoft.PowerToys.Settings.UI.Lib
+{
+
+    public class SndPowerPreviewSettings
+    {
+        [JsonPropertyName("File Explorer Preview")]
+        public PowerPreviewSettings File_Explorer_Preview { get; set; }
+
+        public SndPowerPreviewSettings(PowerPreviewSettings settings)
+        {
+            this.File_Explorer_Preview = settings;
+        }
+
+        public string ToJsonString()
+        {
+            return JsonSerializer.Serialize(this);
+        }
+    }
+}