add function to download and install vsix

images/win/scripts/Installers/Windows2019/Install-AnalysisExtenstion.ps1

@@ -3,42 +3,9 @@
 ##  Desc:  Install the Microsoft Analysis Services Projects Visual Studio extension
 ###################################################################################
 
+Import-Module -Name ImageHelpers -Force;
 
 $extensionUrl = "https://marketplace.visualstudio.com/_apis/public/gallery/publishers/ProBITools/vsextensions/MicrosoftAnalysisServicesModelingProjects/2.9.5/vspackage"
-$extensionDownloadPath = Join-Path $Env:TEMP "Microsoft.DataTools.AnalysisServices.vsix"
-Write-Host "Downloading Microsoft.DataTools.AnalysisServices.vsix extension"
-(New-Object System.Net.WebClient).DownloadFile($extensionUrl, $extensionDownloadPath)
+$extensionName = "Microsoft.DataTools.AnalysisServices.vsix"
 
-Write-Host "Installing Microsoft.DataTools.AnalysisServices.vsix extension"
-try
-{
-     $process = Start-Process `
-    -FilePath "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\VSIXInstaller.exe" `
-    -ArgumentList ("/quiet", "$extensionDownloadPath") `
-    -Wait `
-    -PassThru
-}
-catch
-{
-    Write-Host "There is an error during Microsoft.DataTools.AnalysisServices.vsix installation"
-    $_
-    exit 1
-}
-
-
-$exitCode = $process.ExitCode
-
-if ($exitCode -eq 0 -or $exitCode -eq 1001) # 1001 means the extension is already installed
-{
-    Write-Host "Microsoft.DataTools.AnalysisServices.vsix installed successfully"
-}
-else
-{
-    Write-Host "Unsuccessful exit code returned by the installation process: $exitCode."
-    exit 1
-}
-
-#Cleanup installation files
-Remove-Item -Force -Confirm:$false $extensionDownloadPath
-
-exit $exitCode
+Install-VsixExtension -Url $extensionUrl -Name $extensionName