Add server and frontend migration
Changes:
- Add testv2 (future production) command
- Add new auth package for frontend v2
- Add methods suffixed with v2 to support new frontend.
Todo after migration (v2 is production)
- Replace obsolete PO package parts
- Remove backend HTML translators
- Remove all counterparts of v2 functions
- Remove v1 auth package and refactor auth v2 package.
- Change location of new PO files
Edited by Donutloop