Fix dev setup .vsconfig component IDs for Visual Studio 2026

The winget configuration files now provision Visual Studio 2026 (channel 18.Release), but .vsconfig still listed Visual Studio 2022-era component IDs that were renamed or removed in VS 2026. The VSComponents DSC resource silently skipped them, so the Windows 11 SDK (26100) and WindowsAppSDK C# support never installed, breaking the build (cppwinrt / WindowsAppSDK failures).

- Windows10SDK.22621/26100 -> Windows11SDK.22621/26100 (renamed in VS 2026)
- ComponentGroup.WindowsAppSDK.Cs -> WindowsAppSdkSupport.CSharp; added WindowsAppSdkSupport.Cpp
- Removed Windows10SDK.19041 (only a min-version floor) and Windows10SDK.20348 (unused, removed from VS 2026)
- readme: correct '22621' SDK label from Windows 10 to Windows 11

Fixes #48778

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.vsconfig

@@ -6,10 +6,8 @@
     "Microsoft.VisualStudio.Workload.NativeDesktop",
     "Microsoft.VisualStudio.Workload.ManagedDesktop",
     "Microsoft.VisualStudio.Workload.Universal",
-    "Microsoft.VisualStudio.Component.Windows10SDK.19041",
-    "Microsoft.VisualStudio.Component.Windows10SDK.20348",
-    "Microsoft.VisualStudio.Component.Windows10SDK.22621",
-    "Microsoft.VisualStudio.Component.Windows10SDK.26100",
+    "Microsoft.VisualStudio.Component.Windows11SDK.22621",
+    "Microsoft.VisualStudio.Component.Windows11SDK.26100",
     "Microsoft.VisualStudio.ComponentGroup.UWP.VC",
     "Microsoft.VisualStudio.Component.UWP.VC.ARM64",
     "Microsoft.VisualStudio.Component.VC.Runtimes.ARM64.Spectre",
@@ -19,6 +17,7 @@
     "Microsoft.VisualStudio.Component.VC.ATL",
     "Microsoft.VisualStudio.Component.VC.ATL.Spectre",
     "Microsoft.VisualStudio.Component.Vcpkg",
-    "Microsoft.VisualStudio.ComponentGroup.WindowsAppSDK.Cs"
+    "Microsoft.VisualStudio.Component.WindowsAppSdkSupport.CSharp",
+    "Microsoft.VisualStudio.Component.WindowsAppSdkSupport.Cpp"
   ]
 }

doc/devdocs/readme.md

@@ -11,7 +11,7 @@ Welcome to the PowerToys developer documentation. This documentation provides in
    - Desktop Development with C++
    - WinUI application development
    - .NET desktop development
-   - Windows 10 SDK (10.0.22621.0)
+   - Windows 11 SDK (10.0.22621.0)
    - Windows 11 SDK (10.0.26100.3916)
 1. .NET 8 SDK
 1. Enable long paths in Windows (see [Enable Long Paths](https://docs.microsoft.com/windows/win32/fileio/maximum-file-path-limitation#enabling-long-paths-in-windows-10-version-1607-and-later) for details)