[Module] Stats tractometry module.

[ThoumyreStanislas]

Describe your changes

Add bundle/stats module.

List test packages used by your module

• tractometry.zip

Checklist before requesting a review

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