feat: add --output-format=github-actions flag to test command

[A-d-i-t-y]

Summary

Adds --output-format flag to the test command to improve CI/CD experience.

Problem

Test failures in GitHub Actions are buried in plain text logs. Developers
must open the Microcks UI to see per-operation results.

Solution

• --output-format=plain (default) — existing behavior, no breaking change
• --output-format=github-actions — emits workflow commands as PR annotations

Example output in GitHub Actions

::notice title=Test Passed::Operation GET /beer PASSED
::error title=Test Failed::Operation POST /beer FAILED

Files changed

• cmd/test.go — added --output-format flag with validation
• pkg/connectors/microcks_client.go — added TestResult, TestCaseResult,
  TestStepResult structs and GetTestResultDetails method

Closes #332

[Vaishnav88sk]

@A-d-i-t-y

Please pass the DCO.

[A-d-i-t-y]

Hi @Vaishnav88sk, thank you for the review! I have signed off all commits to pass the DCO check. Could you please verify it and let me know if there are any further changes required? I am happy to work on any feedback you have.

[Caesarsage]

This look like a total rewrite and could be hard to review.

If you are using an AI, it should only make the propose fix and not full change

[A-d-i-t-y]

Hi @Caesarsage, thank you for the feedback! You are right, the changeset is larger than needed.

The core change is only:

1. Three new structs (TestStepResult, TestCaseResult, TestResult) in microcks_client.go
2. One new method GetTestResultDetails() in microcks_client.go
3. The --output-format flag and printing logic in cmd/test.go

The rest of microcks_client.go was unintentionally included. I will clean up the PR to show only the minimal necessary diff. Sorry for the noise!

[A-d-i-t-y]

Hi @Caesarsage @Harsh4902, I have cleaned up the PR. Now it only contains the minimal necessary changes:

1. Three new structs (TestStepResult, TestCaseResult, TestResult) in microcks_client.go
2. One new method GetTestResultDetails() in microcks_client.go
3. The --output-format flag and printing logic in cmd/test.go

Please let me know if any further changes are needed!