🎉 Init monorepo Nuxt 4 + Laravel 12 (Story 1.1)

Setup complet de l'infrastructure projet :
- Frontend Nuxt 4 (SSR, TypeScript, i18n, Pinia, TailwindCSS)
- Backend Laravel 12 API-only avec middleware X-API-Key et CORS
- Design tokens (sky-dark, sky-accent, sky-text) et polices (Merriweather, Inter)
- Documentation planning et implementation artifacts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/app/pages/index.vue

@@ -0,0 +1,5 @@
+<template>
+  <div class="min-h-screen bg-sky-dark flex items-center justify-center">
+    <h1 class="text-4xl font-ui text-sky-text">Skycel</h1>
+  </div>
+</template>