feat: allow hyphens in custom command names and aliases

[paduszyk]

Linked Issues

Closes #7.

Checklist

• I have read and followed the project's Code of Conduct and Contributing Guide.
• I have checked that similar PRs have not been created before.
• I have performed a self-review of my code.
• I have made corresponding changes to the documentation.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (1558c0f) to head (4603805).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #8   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          178       178           
  Branches        32        32           
=========================================
  Hits           178       178           

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