Add automated docs for nf-core modules lint

[ErikDanielsson]

Added lint test documentation for nf-core modules lint. The documentation is added in MyST syntax and the PR is thus dependent on the merge of #1245. Should close #1130.

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

[codecov]

Codecov Report

Merging #1250 (0926f03) into dev (3b8d709) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head 0926f03 differs from pull request most recent head c3224a6. Consider uploading reports for the commit c3224a6 to get more accurate results

@@            Coverage Diff             @@
##              dev    #1250      +/-   ##
==========================================
- Coverage   64.81%   64.80%   -0.01%     
==========================================
  Files          51       51              
  Lines        6002     6001       -1     
==========================================
- Hits         3890     3889       -1     
  Misses       2112     2112              

Impacted Files	Coverage Δ
nf_core/lint/modules_json.py	85.00% <ø> (ø)
nf_core/modules/lint/main_nf.py	80.00% <ø> (ø)
nf_core/modules/lint/meta_yml.py	62.16% <ø> (ø)
nf_core/modules/lint/module_changes.py	76.00% <ø> (ø)
nf_core/modules/lint/module_tests.py	70.73% <ø> (-0.70%)	⬇️
nf_core/modules/lint/module_todos.py	100.00% <ø> (ø)
nf_core/modules/lint/module_version.py	84.61% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3b8d709...c3224a6. Read the comment docs.