Fail build when nugets aren't consolidated (#22233)

* fail build when nugets aren't consolidated

* consolidate nugets

* change tool install

* consolidate nugets

* fix message

.pipelines/ci/templates/build-powertoys-steps.yml

@@ -7,6 +7,13 @@ steps:
   submodules: true
   clean: true
 
+- task: PowerShell@2
+  displayName: Verifying Nuget packages for PowerToys.sln
+  inputs:
+    filePath: '$(build.sourcesdirectory)\.pipelines\verifyNugetPackages.ps1'
+    arguments: -solution '$(build.sourcesdirectory)\PowerToys.sln'
+    pwsh: true
+
 - task: PowerShell@2
   displayName: Verify Arm64 configuration for PowerToys.sln
   inputs:

.pipelines/verifyNugetPackages.ps1

@@ -0,0 +1,18 @@
+[CmdletBinding()]
+Param(
+    [Parameter(Mandatory=$True,Position=1)]
+    [string]$solution
+)
+
+Write-Host "Verifying Nuget packages for $solution"
+
+dotnet tool restore
+dotnet consolidate -s $solution
+
+if (-not $?)
+{
+    Write-Host -ForegroundColor Red "Nuget packages with the same name must all be the same version."
+    exit 1
+}
+
+exit 0