Add topics to the template + update linting

[nvnieuwk]

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[mirpedrol]

I think it would be good to add a new section topics

[codecov]

Codecov Report

❌ Patch coverage is 86.58537% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.35%. Comparing base (24d2916) to head (5e39aa4).
⚠️ Report is 35 commits behind head on dev.

Files with missing lines	Patch %	Lines
nf_core/components/nfcore_component.py	81.08%	7 Missing ⚠️
nf_core/modules/lint/main_nf.py	89.47%	4 Missing ⚠️

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[mashehu]

Could you please add type hints to all the methods you added (not needed for tests)