message: add PlanetScale quickstart guide
diff: @@ -54,6 +54,7 @@ const quickstartItems = readable(
  mapQuickstart("Perl", "quickstart/perl", false),
  mapQuickstart("PHP Drupal", "quickstart/drupal", false),
  mapQuickstart("PHP Laravel", "quickstart/laravel", false),
  + mapQuickstart("PlanetScale", "quickstart/planetscale", false),
  mapQuickstart(
  "Python Django",
  "quickstart/python",
  