UWP .NET9 (#555)

* Ground work for NET9 UWP switch.

* Add launch settings for Wino.Mail

* Added new test WAP project

* fix platforms in slnx solution

* ManagePackageVersionsCentrally set default

* Fixing assets and couple issues with the new packaging project.

* Add back markdown

* Fix nuget warnings

* FIx error in WAP about build tools

* Add build.props with default language preview

* Some AOT compilation progress.

* More AOT stuff.

* Remove deprecated protocol auth activation handler.

* Fix remaining protocol handler for google auth.

* Even more AOT

* More more AOT fixes

* Fix a few more AOT warnings

* Fix signature editor AOT

* Fix composer and renderer AOT JSON

* Outlook Sync AOT

* Fixing bundle generation and package signing.

---------

Co-authored-by: Burak Kaan Köse <bkaankose@outlook.com>

Wino.Core.UWP/Helpers/XamlHelpers.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Globalization;
 using System.Linq;
-using Microsoft.Toolkit.Uwp.Helpers;
+using CommunityToolkit.WinUI.Helpers;
 using Microsoft.UI.Xaml.Controls;
 using Windows.UI;
 using Windows.UI.Text;