* Upgraded to Next.js 16
* Refactored code to comply with React 19.2 ESLint rules
* Refactored some useEffect usages with the new useEffectEvent
* Added Identities page and added second step to set up an identity after accepting an invitation
* Updated all dependencies
* Introduced PNPM catalogs for some frequently updated dependencies
* Bugs fixing and improvements
- Bumped dependencies: `lucide-react`, `react-hook-form`, `@supabase/supabase-js`, `@tanstack/react-query`, `@sentry/nextjs`, and more.
- Added `react-dropzone` to `@kit/ui` for file upload support.
- Adjusted `reset-password.html` to streamline style usage and HTML structure.
- Added new translation keys for file upload functionality.
- Cleaned up import order in `existing-account-hint.tsx`.
