docs(input-menu/select-menu/select): add example with full item width (#4419)

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

docs/app/components/content/examples/select/SelectItemsAvatarExample.vue

@@ -35,6 +35,7 @@ const items = ref([
     }
   }
 ] satisfies SelectItem[])
+
 const value = ref(items.value[0]?.value)
 
 const avatar = computed(() => items.value.find(item => item.value === value.value)?.avatar)