Changes

• Adds a profile for testing the mageck mle subcommand. Can only run on biowulf as it is long-running.
• Adds a blank design matrix for the ci_stub profile for github actions.

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. on backburner until before public release
• [ ] If a new nextflow process is implemented:
  • [ ] docker/singularity container is defined.
  • [ ] 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/