Rename the site to CorralitoComing and switch the UI to English

The name and tagline live in one place, shared/utils/site.ts, and feed the
header, the footer, the home page and the title template.

frontend/app/error.vue

@@ -10,18 +10,18 @@ useSeoMeta({ robots: 'noindex' })
 
 <template>
   <NuxtLayout>
-    <h1>{{ isNotFound ? 'Pagina non trovata' : 'Qualcosa è andato storto' }}</h1>
+    <h1>{{ isNotFound ? 'Page not found' : 'Something went wrong' }}</h1>
 
     <p class="muted">
       {{
         isNotFound
-          ? 'Il contenuto che cerchi non esiste o è stato spostato.'
-          : 'Riprova tra qualche istante.'
+          ? 'The page you are looking for does not exist or has moved.'
+          : 'Please try again in a moment.'
       }}
     </p>
 
     <p>
-      <NuxtLink to="/">Torna alla home</NuxtLink>
+      <NuxtLink to="/">Back to home</NuxtLink>
     </p>
   </NuxtLayout>
 </template>