Cmdpal extension: Powertoys extension for cmdpal (#44006)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request

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## PR Checklist

- [ ] Closes: #xxx
<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed
Installer built, and every command works as expected,
Now use sparse app deployment, so we don't need an extra msix

---------

Co-authored-by: kaitao-ms <kaitao1105@gmail.com>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.PowerToys/Pages/FancyZonesLayoutsPage.cs

@@ -0,0 +1,103 @@
+// 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.Globalization;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.CommandPalette.Extensions;
+using Microsoft.CommandPalette.Extensions.Toolkit;
+using PowerToysExtension.Commands;
+using PowerToysExtension.Helpers;
+
+namespace PowerToysExtension.Pages;
+
+internal sealed partial class FancyZonesLayoutsPage : DynamicListPage
+{
+    private readonly CommandItem _emptyMessage;
+
+    public FancyZonesLayoutsPage()
+    {
+        Icon = PowerToysResourcesHelper.IconFromSettingsIcon("FancyZones.png");
+        Name = Title = "FancyZones Layouts";
+        Id = "com.microsoft.cmdpal.powertoys.fancyzones.layouts";
+
+        _emptyMessage = new CommandItem()
+        {
+            Title = "No layouts found",
+            Subtitle = "Open FancyZones Editor once to initialize layouts.",
+            Icon = PowerToysResourcesHelper.IconFromSettingsIcon("FancyZones.png"),
+        };
+        EmptyContent = _emptyMessage;
+
+        // Purge orphaned cache files in background (non-blocking)
+        Task.Run(FancyZonesThumbnailRenderer.PurgeOrphanedCache);
+    }
+
+    public override void UpdateSearchText(string oldSearch, string newSearch)
+    {
+        RaiseItemsChanged(0);
+    }
+
+    public override IListItem[] GetItems()
+    {
+        try
+        {
+            var layouts = FancyZonesDataService.GetLayouts();
+            if (!string.IsNullOrWhiteSpace(SearchText))
+            {
+                layouts = layouts
+                    .Where(l => l.Title.Contains(SearchText, StringComparison.CurrentCultureIgnoreCase) ||
+                                l.Subtitle.Contains(SearchText, StringComparison.CurrentCultureIgnoreCase))
+                    .ToArray();
+            }
+
+            if (layouts.Count == 0)
+            {
+                return Array.Empty<IListItem>();
+            }
+
+            _ = FancyZonesDataService.TryGetMonitors(out var monitors, out _);
+            var fallbackIcon = PowerToysResourcesHelper.IconFromSettingsIcon("FancyZones.png");
+
+            var items = new List<IListItem>(layouts.Count);
+            foreach (var layout in layouts)
+            {
+                var defaultCommand = new ApplyFancyZonesLayoutCommand(layout, monitor: null);
+
+                var item = new FancyZonesLayoutListItem(defaultCommand, layout, fallbackIcon)
+                {
+                    MoreCommands = BuildLayoutContext(layout, monitors),
+                };
+
+                items.Add(item);
+            }
+
+            return items.ToArray();
+        }
+        catch (Exception ex)
+        {
+            _emptyMessage.Subtitle = ex.Message;
+            return Array.Empty<IListItem>();
+        }
+    }
+
+    private static IContextItem[] BuildLayoutContext(FancyZonesLayoutDescriptor layout, IReadOnlyList<FancyZonesMonitorDescriptor> monitors)
+    {
+        var commands = new List<IContextItem>(monitors.Count);
+
+        for (var i = 0; i < monitors.Count; i++)
+        {
+            var monitor = monitors[i];
+            commands.Add(new CommandContextItem(new ApplyFancyZonesLayoutCommand(layout, monitor))
+            {
+                Title = string.Format(CultureInfo.CurrentCulture, "Apply to {0}", monitor.Title),
+                Subtitle = monitor.Subtitle,
+            });
+        }
+
+        return commands.ToArray();
+    }
+}