docs: migrate to @nuxthq/ui-kit (#405)

Co-authored-by: Sébastien Chopin <seb@nuxt.com>

docs/content/3.forms/4.select-menu.md

@@ -1,9 +1,12 @@
 ---
-github: true
 description: Display a select menu with advanced features.
-headlessui:
-  label: 'Listbox'
-  to: 'https://headlessui.com/vue/listbox'
+links:
+  - label: GitHub
+    icon: i-simple-icons-github
+    to: https://github.com/nuxtlabs/ui/blob/dev/src/runtime/components/forms/SelectMenu.vue
+  - label: 'Listbox'
+    icon: i-simple-icons-headlessui
+    to: 'https://headlessui.com/vue/listbox'
 ---
 
 ## Usage
@@ -122,7 +125,7 @@ excludedProps:
 ---
 ::
 
-::alert{icon="i-heroicons-light-bulb"}
+::callout{icon="i-heroicons-light-bulb"}
 Learn how to customize icons from the [Select](/forms/select#icon) component.
 ::