Updated 1.7 Experimental Release Notes Archival (#5359)

* Updated 1.7 Experimental Release Notes Archival

* Update downloads-archive.md

Author: RDMacLachlan

hub/apps/toc.yml

@@ -547,6 +547,8 @@ items:
                           href: windows-app-sdk/release-notes-archive/preview-channel-1.0.md
                     - name: Experimental channel release notes
                       items: 
+                        - name: Windows App SDK 1.7
+                          href: windows-app-sdk/release-notes-archive/experimental-channel-1.7.md
                         - name: Windows App SDK 1.6
                           href: windows-app-sdk/release-notes-archive/experimental-channel-1.6.md
                         - name: Windows App SDK 1.5

hub/apps/windows-app-sdk/downloads-archive.md

@@ -150,6 +150,14 @@ To learn more, see the [Windows App SDK release channels](release-channels.md) a
 
 ## Experimental releases
 
+### Windows App SDK 1.7 Experimental
+
+| Version                                                                                                                                                                                                                                                                                                                                                                                                | Runtime downloads                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
+| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [1.7 Experimental3 (1.7.250127003-experimental3) ](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental3) <br/> 04/15/2025 <br/> [Release notes](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental3) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.7-experimental3) | [Installer (x64)](https://aka.ms/windowsappsdk/1.7/1.7.250127003-experimental3/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.7/1.7.250127003-experimental3/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.7/1.7.250127003-experimental3/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.7/1.7.250127003-experimental3/Microsoft.WindowsAppRuntime.Redist.1.7.zip) |
+| [1.7 Experimental2 (1.7.250109001-experimental2) ](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental2) <br/> 04/15/2025 <br/> [Release notes](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental2) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.7-experimental2) | [Installer (x64)](https://aka.ms/windowsappsdk/1.7/1.7.250109001-experimental2/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.7/1.7.250109001-experimental2/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.7/1.7.250109001-experimental2/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.7/1.7.250109001-experimental2/Microsoft.WindowsAppRuntime.Redist.1.7.zip) |
+| [1.7 Experimental1 (1.7.241114004-experimental1) ](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental1) <br/> 04/15/2025 <br/> [Release notes](release-notes-archive/experimental-channel-1.7.md#version-17-experimental-170-experimental1) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.7-experimental1) | [Installer (x64)](https://aka.ms/windowsappsdk/1.7/1.7.241114004-experimental1/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.7/1.7.241114004-experimental1/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.7/1.7.241114004-experimental1/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.7/1.7.241114004-experimental1/Microsoft.WindowsAppRuntime.Redist.1.7.zip) |
+
 ###  Windows App SDK 1.6 Experimental
 
 | Version | Runtime downloads |