[Hosts]Add setting to select the file encoding (#26495)

src/settings-ui/Settings.UI.Library/Enumerations/HostsAdditionalLinesPosition.cs

@@ -4,7 +4,7 @@
 
 namespace Settings.UI.Library.Enumerations
 {
-    public enum AdditionalLinesPosition
+    public enum HostsAdditionalLinesPosition
     {
         Top = 0,
         Bottom = 1,

src/settings-ui/Settings.UI.Library/Enumerations/HostsEncoding.cs

@@ -0,0 +1,12 @@
+// 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.
+
+namespace Settings.UI.Library.Enumerations
+{
+    public enum HostsEncoding
+    {
+        Utf8 = 0,
+        Utf8Bom = 1,
+    }
+}

src/settings-ui/Settings.UI.Library/HostsProperties.cs

@@ -18,14 +18,17 @@ namespace Microsoft.PowerToys.Settings.UI.Library
         [JsonConverter(typeof(BoolPropertyJsonConverter))]
         public bool LoopbackDuplicates { get; set; }
 
-        public AdditionalLinesPosition AdditionalLinesPosition { get; set; }
+        public HostsAdditionalLinesPosition AdditionalLinesPosition { get; set; }
+
+        public HostsEncoding Encoding { get; set; }
 
         public HostsProperties()
         {
             ShowStartupWarning = true;
             LaunchAdministrator = true;
             LoopbackDuplicates = false;
-            AdditionalLinesPosition = AdditionalLinesPosition.Top;
+            AdditionalLinesPosition = HostsAdditionalLinesPosition.Top;
+            Encoding = HostsEncoding.Utf8;
         }
     }
 }