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

components.json

@@ -10,9 +10,9 @@
     "prefix": ""
   },
   "aliases": {
-    "components": "~/components",
+    "components": "~/app/components",
     "utils": "~/lib/utils",
-    "ui": "~/components/ui",
+    "ui": "~/app/components/ui",
     "lib": "~/lib",
     "hooks": "~/hooks"
   },