add AutomationNotification for screen readers (#40761)

## Summary of the Pull Request

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## PR Checklist

- [ x ] **Closes:** #38392
- [ x ] **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


## Detailed Description of the Pull Request / Additional comments

Add AutomationNotification to ItemsList_SelectionChanged so that when
user uses keyboard navigation, it sends the title to be read by the
screen reader


## Validation Steps Performed


https://github.com/user-attachments/assets/34a11e55-18ce-440f-97d8-e6ea60c57f78

Co-authored-by: Mike Griese <migrie@microsoft.com>

src/modules/cmdpal/Microsoft.CmdPal.UI/ExtViews/ListPage.xaml.cs

@@ -144,6 +144,18 @@ public sealed partial class ListPage : Page,
         if (ItemsList.SelectedItem != null)
         {
             ItemsList.ScrollIntoView(ItemsList.SelectedItem);
+
+            // Automation notification for screen readers
+            var listViewPeer = Microsoft.UI.Xaml.Automation.Peers.ListViewAutomationPeer.CreatePeerForElement(ItemsList);
+            if (listViewPeer != null && li != null)
+            {
+                var notificationText = li.Title;
+                listViewPeer.RaiseNotificationEvent(
+                    Microsoft.UI.Xaml.Automation.Peers.AutomationNotificationKind.Other,
+                    Microsoft.UI.Xaml.Automation.Peers.AutomationNotificationProcessing.MostRecent,
+                    notificationText,
+                    "CommandPaletteSelectedItemChanged");
+            }
         }
     }