Implement authentication phase with Cidaas OAuth2 integration

- Add authentication middleware to protect routes
- Create API endpoints for login, logout, registration, and user info
- Develop UI components for login and registration forms
- Integrate VeeValidate for form validation
- Update environment configuration for Cidaas settings
- Add i18n support for English and German languages
- Enhance Tailwind CSS for improved styling of auth components
- Document authentication flow and testing procedures

package.json

@@ -17,13 +17,19 @@
     "db:push": "drizzle-kit push"
   },
   "dependencies": {
+    "@nuxtjs/i18n": "^10.1.2",
+    "@vee-validate/zod": "^4.15.1",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "drizzle-orm": "^0.44.7",
+    "jose": "^6.1.0",
+    "lucide-vue-next": "^0.548.0",
     "nuxt": "^4.2.0",
+    "nuxt-auth-utils": "^0.5.25",
     "postgres": "^3.4.7",
     "reka-ui": "^2.6.0",
     "tailwind-merge": "^3.3.1",
+    "vee-validate": "^4.15.1",
     "vue": "^3.5.22",
     "vue-router": "^4.6.3"
   },