Porting of Infant-DWI into nf-pediatric

[gagnonanthony]

Integration into nf-pediatric of the existing Infant-DWI processes, leveraging the nf-neuro module library. Linting won't pass until the required changes are made to nf-neuro.

Checklists:

• Make sure the test suite and actions work.
• Update all fields auto-generated by the template.
• Add complete test suite.

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
• If you've added a new tool - have you followed the pipeline conventions in the contribution docs
• Make sure your code lints (nf-core lint).
• Ensure the test suite passes (nextflow run . -profile test,docker --outdir <OUTDIR>).
• Check for unexpected warnings in debug mode (nextflow run . -profile debug,test,docker --outdir <OUTDIR>).
• Usage Documentation in docs/usage.md is updated.
• Output Documentation in docs/output.md is updated.
• CHANGELOG.md is updated.
• README.md is updated (including new tool citations and authors/contributors).