fix cmdpal toolkit restore failure for slnx

Author: vanzue

src/modules/cmdpal/extensionsdk/Microsoft.CommandPalette.Extensions/Microsoft.CommandPalette.Extensions.vcxproj

@@ -4,7 +4,7 @@
     <PathToRoot>..\..\..\..\..\</PathToRoot>
     <WasdkNuget>$(PathToRoot)packages\Microsoft.WindowsAppSDK.1.8.250907003</WasdkNuget>
     <CppWinRTNuget>$(PathToRoot)packages\Microsoft.Windows.CppWinRT.2.0.240111.5</CppWinRTNuget>
-    <WindowsSdkBuildToolsNuget>$(PathToRoot)packages\Microsoft.Windows.SDK.BuildTools.10.0.26100.4188</WindowsSdkBuildToolsNuget>
+    <WindowsSdkBuildToolsNuget>$(PathToRoot)packages\Microsoft.Windows.SDK.BuildTools.10.0.26100.6901</WindowsSdkBuildToolsNuget>
     <WebView2Nuget>$(PathToRoot)packages\Microsoft.Web.WebView2.1.0.2903.40</WebView2Nuget>
   </PropertyGroup>
   <Import Project="$(WasdkNuget)\build\native\Microsoft.WindowsAppSDK.props" Condition="Exists('$(WasdkNuget)\build\native\Microsoft.WindowsAppSDK.props')" />

src/modules/cmdpal/extensionsdk/Microsoft.CommandPalette.Extensions/packages.config

@@ -12,6 +12,6 @@
   <package id="Microsoft.WindowsAppSDK.InteractiveExperiences" version="1.8.250906004" targetFramework="native" />
   <package id="Microsoft.WindowsAppSDK.Widgets" version="1.8.250904007" targetFramework="native" />
   <package id="Microsoft.WindowsAppSDK.AI" version="1.8.37" targetFramework="native" />
-  <package id="Microsoft.Windows.SDK.BuildTools" version="10.0.26100.4188" targetFramework="native" />
+  <package id="Microsoft.Windows.SDK.BuildTools" version="10.0.26100.6901" targetFramework="native" />
   <package id="Microsoft.Windows.SDK.BuildTools.MSIX" version="1.7.20250829.1" targetFramework="native" />
-</packages>
+</packages>

src/modules/cmdpal/extensionsdk/nuget/BuildSDKHelper.ps1

@@ -54,9 +54,15 @@ if ($IsAzurePipelineBuild) {
 } else {
   $nugetPath = (Join-Path $PSScriptRoot "NugetWrapper.cmd")
 }
+$solutionPath = (Join-Path $PSScriptRoot "..\..\..\..\..\PowerToys.slnx")
 
 if (($BuildStep -ieq "all") -Or ($BuildStep -ieq "build")) {
-  & $nugetPath restore (Join-Path $PSScriptRoot "..\..\..\..\..\PowerToys.slnx")
+  $restoreArgs = @(
+    $solutionPath
+    "/t:Restore"
+    "/p:RestorePackagesConfig=true"
+  )
+  & $msbuildPath $restoreArgs
 
   Try {
     foreach ($config in $Configuration.Split(",")) {