feat(seo): add meta tags and page titles

Configure default head meta and title template in nuxt.config.ts
Add dynamic SEO meta tags and robots directives to all pages

app/pages/index.vue

@@ -27,6 +27,20 @@ const [bookingConfig, contactsResponse] = await Promise.all([
   apiClient<{ contacts: PublicContact[] }>('/api/public/contacts')
 ])
 
+const seoDescription = computed(() => {
+  return `${bookingConfig.event.dateLabel} · ${bookingConfig.event.timeLabel} · ${bookingConfig.event.venue}`
+})
+
+useSeoMeta({
+  title: () => bookingConfig.event.title,
+  description: () => seoDescription.value,
+  ogTitle: () => bookingConfig.event.title,
+  ogDescription: () => seoDescription.value,
+  twitterTitle: () => bookingConfig.event.title,
+  twitterDescription: () => seoDescription.value,
+  robots: 'index,follow'
+})
+
 const eventDetails = computed(() => [
   {
     label: t('common.date'),