feat: rewrite to use app config and rework docs (#143)

Co-authored-by: Daniel Roe <daniel@roe.dev>
Co-authored-by: Sébastien Chopin <seb@nuxt.com>

docs/components/content/examples/VerticalNavigationExample.vue

@@ -0,0 +1,24 @@
+<script setup>
+const links = [{
+  label: 'Profile',
+  avatar: {
+    src: 'https://avatars.githubusercontent.com/u/739984?v=4'
+  }
+}, {
+  label: 'Installation',
+  icon: 'i-heroicons-home',
+  to: '/getting-started/installation'
+}, {
+  label: 'Vertical Navigation',
+  icon: 'i-heroicons-chart-bar',
+  to: '/navigation/vertical-navigation'
+}, {
+  label: 'Command Palette',
+  icon: 'i-heroicons-command-line',
+  to: '/navigation/command-palette'
+}]
+</script>
+
+<template>
+  <UVerticalNavigation :links="links" />
+</template>