Added new module oarfish - #12638

Added new module - oarfish

Closes #12639

• [✓] This comment contains a description of changes (with reason).
• [✓] If you've fixed a bug or added code that should be tested, add tests!
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• 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:
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    • nf-core subworkflows test <SUBWORKFLOW> --profile singularity
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