refactor(cz): better typing and refactor message method

[bearomorphism]

Description

Checklist

• I have read the contributing guidelines

Code Changes

• Add test cases to all the changes you introduce
• Run poetry all locally to ensure this change passes linter check and tests
• Manually test the changes:
  • Verify the feature/bug fix works as expected in real-world scenarios
  • Test edge cases and error conditions
  • Ensure backward compatibility is maintained
  • Document any manual testing steps performed
• Update the documentation for the changes

Documentation Changes

• Run poetry doc locally to ensure the documentation pages renders correctly
  • Check if there are any broken links in the documentation

When running poetry doc, any broken internal documentation links will be reported in the console output like this:

INFO    -  Doc file 'config.md' contains a link 'commands/bump.md#-post_bump_hooks', but the doc 'commands/bump.md' does not contain an anchor '#-post_bump_hooks'.

Expected Behavior

Steps to Test This Pull Request

Additional Context

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (refactors@baee83e). Learn more about missing BASE report.

Additional details and impacted files

@@             Coverage Diff              @@
##             refactors    #1472   +/-   ##
============================================
  Coverage             ?   97.83%           
============================================
  Files                ?       57           
  Lines                ?     2628           
  Branches             ?        0           
============================================
  Hits                 ?     2571           
  Misses               ?       57           
  Partials             ?        0           

Flag	Coverage Δ
unittests	97.83% <100.00%> (?)

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[Lee-W]

mostly good, one nitpick

[Lee-W]

opps, merge conflict

[bearomorphism]

@Lee-W could you help to rerun the check?