Allow exporting to multiple schema files #5
Description
Ideally it'd be possible to reference a named ID from one schema in another.
Currently, this requires running data bakery twice, once for each schema to export to individual files.
This makes it impossible to use a NamedId value across schemas.
One solution for this could be to include an an optional export like SCHEMA_NAME to recipe files, to allow overriding the default schema file for exports.