feat(theme)!: migrate from heroicons to lucide (#2540)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/app/components/content/examples/dropdown-menu/DropdownMenuOpenExample.vue

@@ -7,18 +7,18 @@ defineShortcuts({
 
 const items = [{
   label: 'Profile',
-  icon: 'i-heroicons-user'
+  icon: 'i-lucide-user'
 }, {
   label: 'Billing',
-  icon: 'i-heroicons-credit-card'
+  icon: 'i-lucide-credit-card'
 }, {
   label: 'Settings',
-  icon: 'i-heroicons-cog'
+  icon: 'i-lucide-cog'
 }]
 </script>
 
 <template>
   <UDropdownMenu v-model:open="open" :items="items" class="w-48">
-    <UButton label="Open" color="neutral" variant="outline" icon="i-heroicons-bars-3" />
+    <UButton label="Open" color="neutral" variant="outline" icon="i-lucide-menu" />
   </UDropdownMenu>
 </template>