CLI smoke + integration tests

[ulises-jeremias]

Summary

End-to-end CLI tests using stub templates.

CNA mapping

CNA: packages/create-awesome-node-app/tests/*.test.mts.

Acceptance criteria

• Smoke test for --help and scaffold with file:// stub
• Error-output tests
• Cache integration tests

Blocked by

none

Blocks

none

Reference

Parity matrix (workspace): knowledge/create-python-app-parity-matrix.md
Reference repo: https://github.com/Create-Node-App/create-node-app

Parent epic

#5