Improvements

- Backported Rewrite's localisation system to legacy: to contribute new translations, please use this page
- As a result of this, the following languages are now available in legacy: cs, de, en, es, fr, hu, it, ja, nb, nl, nn, pt, ru, sv, tr, uk, zh

Fixes

- Improved handling of invalid gate files as to prevent a potential migrator crash.
- Significantly optimized the migrator as to mitigate the potential for a process hang when importing extremely large past deployments.
- Improved handling of some potential error states involving Floodgate and Geyser.