Replace setup-dev-env.ps1 with WinGet configuration file

Replace the PowerShell prerequisite checker with a declarative WinGet
configuration file (.config/configuration.winget) that installs all
build prerequisites automatically:

- Developer Mode (via Microsoft.Windows.Settings/WindowsSettings)
- CMake (via WinGet package Kitware.CMake)
- Visual Studio 2022 Community (via WinGet package)
- VS components from .vsconfig (via Microsoft.VisualStudio.DSC/VSComponents)

Usage: winget configure .config\configuration.winget

Follows the convention used by Terminal, PowerToys, and winget-cli.
Drop the Azure Artifacts Credential Provider check (public feed).
Update dev-loop.md to reference winget configure as the primary setup
method, with manual install steps in a collapsed details block.

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

Author: Ben Hillis

.config/configuration.winget

@@ -0,0 +1,45 @@
+# yaml-language-server: $schema=https://aka.ms/configuration-dsc-schema/0.2
+# Reference: https://github.com/microsoft/WSL/blob/master/doc/docs/dev-loop.md
+#
+# Usage:
+#   winget configure .config\configuration.winget
+#
+# This configuration installs all prerequisites for building WSL.
+# It is idempotent — safe to run multiple times.
+properties:
+  resources:
+    - resource: Microsoft.Windows.Settings/WindowsSettings
+      directives:
+        description: Enable Developer Mode (required for symbolic link support)
+        allowPrerelease: true
+        securityContext: elevated
+      settings:
+        DeveloperMode: true
+    - resource: Microsoft.WinGet.DSC/WinGetPackage
+      id: cmake
+      directives:
+        description: Install CMake
+        securityContext: elevated
+      settings:
+        id: Kitware.CMake
+        source: winget
+    - resource: Microsoft.WinGet.DSC/WinGetPackage
+      id: vsPackage
+      directives:
+        description: Install Visual Studio 2022 Community (any edition is OK)
+        securityContext: elevated
+      settings:
+        id: Microsoft.VisualStudio.2022.Community
+        source: winget
+    - resource: Microsoft.VisualStudio.DSC/VSComponents
+      dependsOn:
+        - vsPackage
+      directives:
+        description: Install required VS workloads from .vsconfig
+        allowPrerelease: true
+        securityContext: elevated
+      settings:
+        productId: Microsoft.VisualStudio.Product.Community
+        channelId: VisualStudio.17.Release
+        vsConfigFile: '${WinGetConfigRoot}\..\.vsconfig'
+  configurationVersion: 0.2.0

doc/docs/dev-loop.md

@@ -2,24 +2,29 @@
 
 ## Prerequisites 
 
-You can verify all prerequisites are installed by running `tools\setup-dev-env.ps1`.
+All prerequisites can be installed automatically with a single command:
 
-The following tools are required to build WSL: 
+```
+winget configure .config\configuration.winget
+```
+
+This installs CMake, Visual Studio 2022 with the required components (via [`.vsconfig`](https://github.com/microsoft/WSL/blob/master/.vsconfig)), and enables Developer Mode. The configuration is idempotent — safe to run multiple times.
+
+See [WinGet Configuration](https://learn.microsoft.com/windows/package-manager/configuration/) for more details.
+
+<details>
+<summary>Manual installation</summary>
+
+If you prefer to install prerequisites manually:
 
 - CMake >= 3.25
     - Can be installed with `winget install Kitware.CMake`
-- Visual Studio with the following components (install via [`.vsconfig`](https://github.com/microsoft/WSL/blob/master/.vsconfig) — use VS Installer → More → Import configuration, or `winget install Microsoft.VisualStudio.2022.Community --override "--wait --quiet --config .vsconfig"`):
-    - Windows SDK 26100
-    - MSBuild
-    - Universal Windows platform support for v143 build tools (X64 and ARM64)
-    - MSVC v143 - VS 2022 C++ ARM64 build tools (Latest + Spectre) (X64 and ARM64)
-    - C++ core features
-    - C++ ATL for latest v143 tools (X64 and ARM64)
-    - C++ Clang compiler for Windows
-    - .NET desktop development
-    - .NET WinUI app development tools
-
-- Building WSL requires support for symbolic links. To ensure this capability, enable [Developer Mode](https://learn.microsoft.com/en-us/windows/apps/get-started/enable-your-device-for-development) in Windows Settings or execute the build process with Administrator privileges.
+- Visual Studio 2022 with the required components:
+    - Use VS Installer → More → Import configuration and select [`.vsconfig`](https://github.com/microsoft/WSL/blob/master/.vsconfig)
+    - Or: `winget install Microsoft.VisualStudio.2022.Community --override "--wait --quiet --config .vsconfig"`
+- Enable [Developer Mode](https://learn.microsoft.com/en-us/windows/apps/get-started/enable-your-device-for-development) in Windows Settings (required for symbolic link support)
+
+</details>
 
 ### ARM64 development