[Subworkflow] BundleSeg subworkflow.

[gagnonanthony]

Describe your changes

Add BundleSeg as a subworkflow to be chained with nf-tractoflow. It might not be the most efficient way, but I made the Atlas directory optional. If provided, it must abide by the structure convention specified in the meta.yml. If not provided, the subworkflow will fetch the atlas and config archives directly from Zenodo.

@AlexVCaron and @arnaudbore, I'm open to suggestions!

List test packages used by your module

• tracking.zip

Checklist before requesting a review

• Create the tool:
  • Edit ./modules/nf-scil/<category>/<tool>/main.nf
  • Edit ./modules/nf-scil/<category>/<tool>/meta.yml
• Generate the tests:
  • Edit ./tests/modules/nf-scil/<category>/<tool>/main.nf
  • Edit ./tests/modules/nf-scil/<category>/<tool>/nextflow.config
  • Add test data locally for tests with the fork repository
  • Generate the test infrastructure and md5sum for all outputs
• Ensure the syntax is correct :
  • Check indentation abides with the rest of the library (don't hesitate to correct others !)
  • Lint everything. Ensure your variables have good names.

[AlexVCaron]

All good on my end, I'll let @arnaudbore comment on functionality. Great work, you're a rockstar 🚀

[arnaudbore]

LGTM need a quick fix then 🎉