feat: i18n switcher in app-frontend (#4990)

* feat: app i18n stuff

* feat: locale switching on load

* feat: db migration

* feat: polish + fade indicator impl onto TabbedModal

* fix: prepr checks

* fix: remove staging lock for language switching

* fix: lint

packages/ui/src/utils/index.ts

@@ -1,5 +1,6 @@
 export * from './auto-icons'
 export * from './common-messages'
+export * from './events'
 export * from './game-modes'
 export * from './notices'
 export * from './savable'