chore(cli): refactor command throws error on failure

[kaizencc]

Follow up to #631. #631 (comment)

an exit code of 1 should not map to an event failure, so the refactor command is incorrectly implemented.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.29%. Comparing base (edef43c) to head (e2960d4).

Files with missing lines	Patch %	Lines
packages/aws-cdk/lib/cli/cdk-toolkit.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #737      +/-   ##
==========================================
- Coverage   81.34%   81.29%   -0.05%     
==========================================
  Files          63       63              
  Lines        8320     8320              
  Branches      967      961       -6     
==========================================
- Hits         6768     6764       -4     
- Misses       1526     1531       +5     
+ Partials       26       25       -1     

Flag	Coverage Δ
suite.unit	81.29% <0.00%> (-0.05%)	⬇️

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