feat: support command aliases

[HigherOrderLogic]

Add support for defining command aliases.

[HigherOrderLogic]

It seems that the CI is failing due to difference in underline and bold text?

[codecov]

Codecov Report

Attention: Patch coverage is 64.00000% with 9 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@6341dc3). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/command.ts	57.14%	9 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #170   +/-   ##
=======================================
  Coverage        ?   92.45%           
=======================================
  Files           ?        7           
  Lines           ?      530           
  Branches        ?      167           
=======================================
  Hits            ?      490           
  Misses          ?       40           
  Partials        ?        0           

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