Refactor docs to use Nuxt Content v3 and file-based pages

Migrates documentation from markdown-based content to Nuxt Content v3 with file-based routing. Removes old markdown content files, adds new Vue page components, updates layout and content rendering logic, introduces a Prose wrapper, and updates dependencies for Nuxt Content v3 and related packages.

docs/app.vue

@@ -1,27 +1,21 @@
-<script setup lang="ts">
-import Hero from '~/components/Hero.vue'
-import ApplicationHeader from '~/components/ApplicationHeader.vue'
-import SidebarNavigation from '~/components/SidebarNavigation.vue'
-import PageContent from '~/components/PageContent.vue'
-import '../src/css/vue-select.css'
-
-useHead({
-  title: 'Vue Select',
-  bodyAttrs: { class: 'bg-white dark:bg-slate-900' },
-})
-
-const { page } = useContent()
-</script>
+<script setup lang="ts"></script>
 
 <template>
-  <div>
-    <ApplicationHeader />
-    <Hero v-if="page?.hero" />
-    <div
-      class="relative mx-auto flex max-w-8xl justify-center sm:px-2 lg:px-8 xl:px-12"
-    >
-      <SidebarNavigation />
-      <PageContent />
-    </div>
-  </div>
+  <NuxtLayout>
+    <NuxtPage />
+  </NuxtLayout>
 </template>
+
+<style>
+@media (prefers-reduced-motion: no-preference) {
+  .page-enter-active,
+  .page-leave-active {
+    transition: all 0.2s;
+  }
+  .page-enter-from,
+  .page-leave-to {
+    opacity: 0;
+    filter: blur(0.5rem);
+  }
+}
+</style>