Use cliffy to rewrite cli

[d2verb]

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 60.97561% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.19%. Comparing base (5c3650e) to head (6f8d1a4).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
src/cli.ts	25.00%	9 Missing ⚠️
src/commands/new.ts	66.66%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
- Coverage   82.30%   77.19%   -5.12%     
==========================================
  Files           4        6       +2     
  Lines         130      171      +41     
  Branches       11       14       +3     
==========================================
+ Hits          107      132      +25     
- Misses         23       39      +16     

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