docs: keep guides first in docs search (#367)

Author: posva

docs/app/components/UContentSearch.vue

@@ -0,0 +1,12 @@
+<script setup lang="ts">
+import ContentSearch from '@nuxt/ui/components/content/ContentSearch.vue'
+
+defineOptions({ inheritAttrs: false })
+</script>
+
+<template>
+  <ContentSearch
+    v-bind="$attrs"
+    preserve-group-order
+  />
+</template>