Imports translated messages from Gettext PO files into
priv/translations/<domain>/*.json.
mix verified_translations.import_po [PRIV_GETTEXT_DIR] [--domain default]Only messages with at least one translation in a configured locale are
imported, from the given domains (default: default; repeat --domain).
Existing JSON files are kept and only their empty locales are filled; an
unreadable existing file aborts the import. Fuzzy, plural and msgctxt
messages are skipped. Requires :expo (a dependency of Gettext).