feat: drugZ

[kelly-sovacool]

Changes

New process DRUGZ. It's so simple it doesn't need to be it's own subworkflow.

Issues

resolves #4

PR Checklist

(Strikethrough any points that are not applicable.)

• This comment contains a description of changes with justifications, with any relevant issues linked.
• [ ] Write unit tests for any new features, bug fixes, or other code changes. testing framework not yet implemented
• [ ] Update docs if there are any API changes.
• If a new nextflow process is implemented:
  • docker container is set in conf/modules.config.
  • stub is defined.
• Update CHANGELOG.md with a one-line description of these changes and reference the PR number. Guidelines: https://keepachangelog.com/en/1.1.0/