docs: add templates link

Author: atinux

docs/app.vue

@@ -20,6 +20,11 @@ const links = [{
   label: 'Playground',
   icon: 'i-ph-play-duotone',
   to: '/playground'
+}, {
+  label: 'Templates',
+  icon: 'i-ph-browsers-duotone',
+  to: 'https://nuxt.com/templates',
+  target: '_blank'
 }, {
   label: 'Releases',
   icon: 'i-heroicons-rocket-launch-solid',