GitLab

Removes actual tests for now to test CI / CD workflow

See https://gitlab.com/gitlab-org/gitlab-foss/issues/64959

This ensures that these resources are properly closed,
even with an exception.

This is the config usable in production.

Kotlin way of handling closable resources.

Now actually runs the program. Still no assert though.

To make it clearer what went wrong.

- update kafka message format
- now supports CSV & TSV
- style fixes

implements yaml settings loader
implements kafka producer

upgrade kotlin version