generate files in 3 different packages

[MS-24]

This might be similar to #1951

I would need structure my project to separate db, model and service
But sqlc generates 3 files in a single output path under same package .
Is there a way I could configure 3 different package names for 3 different files.
Something similar to out file name
"
output_db_file_name: "db.go"
output_models_file_name: "models.go"
output_querier_file_name: "querier.go"
"
Can we have like below ?
db_package: "db"
models_package: "models"
service_package: "service"

Thanks!!

[kyleconroy]

Closing as a duplicate of #1941