Move storage into database
It's bad for cloud environments to have the translations inside a static file in
data/translator. We need to move this into the database, so it gets properly backupped and deployed.
The schema doesn't need to change, it should just be mapped 1:1 to the database. Entries shall still be grouped and have multiple translations for each of them.
On the other side, the generated language files (
data/translator/de_de.yml) should stay and be re-generated whenever neccessary. But they should be viewed as a cache, not a primary storage.