feat: Setup Nuxt UI

wp-content/themes/headless/app/components/site/page/PageHeader.vue

@@ -0,0 +1,11 @@
+<script setup lang="ts">
+defineProps<{ title?: string }>();
+</script>
+
+<template>
+  <header v-if="title" class="py-3">
+    <div class="container">
+      <h1 class="heading-1">{{ title }}</h1>
+    </div>
+  </header>
+</template>