feat(herbs2mermaid) - implement herbs2mermaid to render usecases diagram

[maikmb]

Fixes #

37

Proposed Changes

1. Add herbs2mermaid to render usecases diagram
2. Usecase dark/light mode in graphs

Readiness Checklist

Author/Contributor

• [X] If documentation is needed for this change, has that been included in this pull request
• [X] Remember to check if code coverage decrease, if so, please implement the necessary tests

Reviewing Maintainer

• [X] Label as breaking if this is a large fundamental change
• [ ] Label as either automation, bug, documentation, enhancement, infrastructure, or performance

[codecov[bot]]

Codecov Report

Merging #50 (64e4078) into main (de42f66) will decrease coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
- Coverage   97.24%   97.22%   -0.03%     
==========================================
  Files           9        8       -1     
  Lines         109       72      -37     
==========================================
- Hits          106       70      -36     
+ Misses          3        2       -1     

Impacted Files	Coverage Δ
src/template/components/requestCard.js	100.00% <ø> (ø)
src/template/components/responseCard.js	100.00% <ø> (ø)
src/template/components/scenarioCard.js	100.00% <ø> (ø)
src/shelf.js	95.00% <100.00%> (+0.26%)	:arrow_up:
src/template/components/stepsCard.js	100.00% <100.00%> (ø)
src/template/default.js	100.00% <100.00%> (ø)

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[herbsjs-robot]

:tada: This PR is included in version 4.1.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: