[Module] bundle fixel afd

[grahamlittlephd]

Describe your changes

Added module: Uses SCILPY to calculate mean AFD along a bundle.

Say which test data are used by your module

Using processing.zip, currently cannot fetch this data, need to test/update prior to merge

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.

[arnaudbore]

Sorry @grahamlittlephd 👍 Thank you for your work
#155