feat(01-01): initialize Nuxt 4 project with all modules

- nuxt.config.ts with compatibilityVersion 4, SSR, 6 modules
- app/app.vue and app/pages/index.vue minimal setup
- pnpm as package manager with all dependencies installed
- TypeScript strict mode enabled
- .gitignore updated for Nuxt (.nuxt, .output, .env)
- tsconfig.json extends .nuxt/tsconfig.json

nuxt.config.ts

@@ -0,0 +1,25 @@
+export default defineNuxtConfig({
+  future: {
+    compatibilityVersion: 4
+  },
+  ssr: true,
+  modules: [
+    '@nuxt/ui',
+    '@nuxtjs/i18n',
+    '@nuxt/eslint',
+    '@nuxtjs/sitemap',
+    'nuxt-gtag',
+    '@nuxt/image'
+  ],
+  typescript: {
+    strict: true
+  },
+  i18n: {
+    locales: ['fr', 'en'],
+    defaultLocale: 'fr'
+  },
+  gtag: {
+    id: 'G-CDVVNFY6MV',
+    enabled: false
+  }
+})