Implement activation requirement for protected routes

- Added a new `useRequireActivated` hook to enforce user activation before accessing certain routes, redirecting unauthenticated users to the login page and inactive users to the dashboard.
- Updated the `InstructionsPage` and `NewsPage` components to utilize the new activation check, enhancing user flow and security.
- Conditional rendering of navigation links in the `RootLayout` based on user activation status, improving user experience by hiding inaccessible features.

frontend/src/routes/news.tsx

@@ -1,13 +1,13 @@
 import { createFileRoute } from '@tanstack/react-router'
 import { useTranslation } from 'react-i18next'
-import { useRequireAuth } from '@/features/auth/guards'
+import { useRequireActivated } from '@/features/auth/guards'
 import { NewsFeed } from '@/features/news/NewsFeed'
 
 export const Route = createFileRoute('/news')({ component: NewsPage })
 
 function NewsPage() {
   const { t } = useTranslation()
-  const { isReady } = useRequireAuth()
+  const { isReady } = useRequireActivated()
 
   if (!isReady) return null