feat: add retry capability for windows license activation

dist/platforms/windows/entrypoint.ps1

@@ -15,10 +15,21 @@ Get-Process -Name regsvr32 | ForEach-Object { Stop-Process -Id $_.Id -Force }
 
 # Activate Unity
 if ($env:SKIP_ACTIVATION -ne "true") {
+  $maxRetries = 3
+  $retryCount = 0
+  do {
     . "c:\steps\activate.ps1"
+    if ($ACTIVATION_EXIT_CODE -eq 0) {
+      break
+    }
+    $retryCount++
+    Write-Warning "Activation failed with exit code $ACTIVATION_EXIT_CODE. Retrying ($retryCount/$maxRetries)..."
+    Start-Sleep -Seconds 5
+  } while ($retryCount -lt $maxRetries)
 
   # If we didn't activate successfully, exit with the exit code from the activation step.
   if ($ACTIVATION_EXIT_CODE -ne 0) {
+    Write-Error "Unity activation failed after $maxRetries attempts with exit code $ACTIVATION_EXIT_CODE"
     exit $ACTIVATION_EXIT_CODE
   }
 }