Install 7zip first

Author: benmcmorran

azure-pipelines.yml

@@ -91,6 +91,12 @@ steps:
     displayName: Build and pack extension
 
   # Extract the VSIXes, sign what we can, then pack it back up and publish it.
+  - pwsh: |
+      $path = Join-Path $Env:TEMP "7z-installer.exe"
+      Invoke-WebRequest https://www.7-zip.org/a/7z2201-x64.exe -OutFile $path
+      Start-Process -FilePath $path -Args "/S" -Verb RunAs -Wait
+      Remove-Item $path
+    displayName: Install 7zip
   - pwsh: Get-ChildItem out\vsix | Foreach-Object { 7z e $_.FullName -o$(Build.StagingDirectory)\vscode-arduino\$_.BaseName }
     displayName: Extract extension for signing
   - task: NuGetToolInstaller@1