Improve start-frontend CLI test

[jinmayamashita]

Pull Request Checklist

• [x] I have checked that this pull request is not a duplicate of a pre-existing pull request
• [x] I have self-reviewed my changes
  • [x] There are no spelling mistakes
  • [x] There are no remaining debug log prints (i.e. console.log())
  • [x] Comments were written for complex code
• [x] I have checked that all tests are passing (for bug fixes and enhancements)
  • [x] CLI Test (npm run test:cli)
  • [x] Unit Test (npm run test:modules)
  • [x] E2E Test (npm run e2e)
• [x] I have added and/or modified relevant tests for my changes (for bug fixes and enhancements)
• [x] I have added and/or modified relevant documentations for my changes (if necessary)

Description

In the existing tests, there was no check to verify if the output generated by running the CLI was correct, so I added it.

Context

Resolves #1255

Before

https://github.com/monstar-lab-oss/ml-frontend/blob/e589781c29263fa61f299fb6832096ccd909ddfc/packages/start-frontend/__tests__/cli.test.ts#L72-L98

After

https://github.com/monstar-lab-oss/ml-frontend/blob/6ebf40f432c8173d43fa9f0b6e873d8f3a4f9586/packages/start-frontend/__tests__/cli.test.ts#L108-L174

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 3b0ba4fd2a70b10148d740291a1da63740d230da

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | -------------- | ----- | | start-frontend | Patch |

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