update installer

scripts/bootstrap.ps1

@@ -28,7 +28,8 @@ param(
     [string]$PlaywrightBrowsers = "chromium",
     [switch]$FixUrllib3,
     [switch]$RemovePth,
-    [switch]$Quiet
+    [switch]$Quiet,
+    [switch]$NoPause
 )
 
 $ErrorActionPreference = "Stop"
@@ -71,6 +72,7 @@ if ($CreateDesktopShortcut -or $CreateStartMenuShortcut -or $FixUrllib3 -or $Rem
 }
 
 try {
+    $exitCode = 1
     $pythonCommand = $null
     if ($Python) {
         $pythonCommand = $Python
@@ -90,10 +92,25 @@ try {
         & $pythonCommand $bootstrapPath @pythonArgs
     }
     $exitCode = $LASTEXITCODE
+    if (-not $Quiet) {
+        if ($exitCode -eq 0) {
+            Write-Host "Installation finished successfully." -ForegroundColor Green
+        } else {
+            Write-Host "Installation exited with code $exitCode." -ForegroundColor Red
+        }
+    }
 } finally {
     if ($temporaryBootstrap -and (Test-Path $bootstrapPath)) {
         Remove-Item -LiteralPath $bootstrapPath -Force -ErrorAction SilentlyContinue
     }
 }
 
+if (-not $NoPause -and -not $Quiet -and [Environment]::UserInteractive) {
+    try {
+        [void](Read-Host "Press Enter to close installer")
+    } catch {
+        # Ignore host/input edge cases and continue to exit.
+    }
+}
+
 exit $exitCode