Rename the [Ee]xts dir to ext (#38852)

**WARNING:** This PR will probably blow up all in-flight PRs

at some point in the early days of CmdPal, two of us created seperate
`Exts` and `exts` dirs. Depending on what the casing was on the branch
that you checked one of those out from, it'd get stuck like that on your
PC forever.

Windows didn't care, so we never noticed.

But GitHub does care, and now browsing the source on GitHub is basically
impossible.

Closes #38081

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowWalker/Commands/ExplorerInfoResultCommand.cs

@@ -0,0 +1,67 @@
+// 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.ComponentModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.CmdPal.Ext.WindowWalker.Components;
+using Microsoft.CommandPalette.Extensions;
+using Microsoft.CommandPalette.Extensions.Toolkit;
+
+namespace Microsoft.CmdPal.Ext.WindowWalker.Commands;
+
+internal sealed partial class ExplorerInfoResultCommand : InvokableCommand
+{
+    public ExplorerInfoResultCommand()
+    {
+    }
+
+    public static bool OpenInShell(string path, string? arguments = null, string? workingDir = null, ShellRunAsType runAs = ShellRunAsType.None, bool runWithHiddenWindow = false)
+    {
+        using var process = new Process();
+        process.StartInfo.FileName = path;
+        process.StartInfo.WorkingDirectory = string.IsNullOrWhiteSpace(workingDir) ? string.Empty : workingDir;
+        process.StartInfo.Arguments = string.IsNullOrWhiteSpace(arguments) ? string.Empty : arguments;
+        process.StartInfo.WindowStyle = runWithHiddenWindow ? ProcessWindowStyle.Hidden : ProcessWindowStyle.Normal;
+        process.StartInfo.UseShellExecute = true;
+
+        if (runAs == ShellRunAsType.Administrator)
+        {
+            process.StartInfo.Verb = "RunAs";
+        }
+        else if (runAs == ShellRunAsType.OtherUser)
+        {
+            process.StartInfo.Verb = "RunAsUser";
+        }
+
+        try
+        {
+            process.Start();
+            return true;
+        }
+        catch (Win32Exception ex)
+        {
+            ExtensionHost.LogMessage(new LogMessage() { Message = $"Unable to open {path}: {ex.Message}" });
+            return false;
+        }
+    }
+
+    public override ICommandResult Invoke()
+    {
+        OpenInShell("rundll32.exe", "shell32.dll,Options_RunDLL 7"); // "shell32.dll,Options_RunDLL 7" opens the view tab in folder options of explorer.
+        return CommandResult.Dismiss();
+    }
+
+    public enum ShellRunAsType
+    {
+        None,
+        Administrator,
+        OtherUser,
+    }
+}