[PTRun][Shell]Select which shell is used (#28121)

* [PTRun] LeaveShellOpen condition added to run command

* [PTRun] Keep shell open added to shell plugin settings.

* [PTRun] Unnecessary variable deleted. Formatting.

* [PTRun] Variable name changed.

* [PTRun] Shell selection

* [PTRun] Bugfix

* [PTRun] Review comments.

* [PTRun] Revert commit

* [PTRun] An enumaration is added to PluginAdditionalOption for selection types.

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

@@ -2,10 +2,18 @@
 // 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;
+
 namespace Microsoft.PowerToys.Settings.UI.Library
 {
     public class PluginAdditionalOption
     {
+        public enum SelectionType
+        {
+            Checkbox = 0,
+            Combobox = 1,
+        }
+
         public string Key { get; set; }
 
         public string DisplayLabel { get; set; }
@@ -16,5 +24,11 @@ namespace Microsoft.PowerToys.Settings.UI.Library
         public string DisplayDescription { get; set; }
 
         public bool Value { get; set; }
+
+        public List<string> ComboBoxOptions { get; set; }
+
+        public int Option { get; set; }
+
+        public int SelectionTypeValue { get; set; }
     }
 }