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 ✅

Project coverage is 97.83%. Comparing base (59fd3f5) to head (2af4c71).

Additional details and impacted files

@@            Coverage Diff             @@
##           refactors    #1472   +/-   ##
==========================================
  Coverage      97.82%   97.83%           
==========================================
  Files             57       57           
  Lines           2619     2629   +10     
==========================================
+ Hits            2562     2572   +10     
  Misses            57       57           

Flag	Coverage Δ
unittests	97.83% <100.00%> (+<0.01%)	⬆️

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[Lee-W]

I believe the new logic makes it harder for humans to read. 🤔

[bearomorphism]

reverted. agree

[Lee-W]

mostly good, one nitpick