initial trycycler subsample commit

[watsonar]

PR checklist

Contributes first trycycler command (trycycler subsample) for #829
Still need to add trycycler cluster, reconcile, msa, partition, and consensus

Includes nf-tests, and a stub, and an nf-test for the stub.

• 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 module conventions in the contribution docs
• If necessary, include test data in your PR.
• Remove all TODO statements.
• Emit the versions.yml file.
• Follow the naming conventions.
• Follow the parameters requirements.
• Follow the input/output options guidelines.
• Add a resource label
• Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • For modules:
    • nf-core modules test <MODULE> --profile docker
    • nf-core modules test <MODULE> --profile singularity
    • nf-core modules test <MODULE> --profile conda
  • For subworkflows:
    • nf-core subworkflows test <SUBWORKFLOW> --profile docker
    • nf-core subworkflows test <SUBWORKFLOW> --profile singularity
    • nf-core subworkflows test <SUBWORKFLOW> --profile conda

[SPPearce]

Some relatively minor comments.
Can you remove all the TODO lines too please.

[SPPearce]

Maybe add a comment to say what this is actually doing...

[watsonar]

Moved this code to Nextflow rather than bash, added a comment, in d9cc745

[SPPearce]

Looks nice :)