Closes #121 Add "comments" in the JSON of expected results

[Khadreal]

Description

Add comments to json file. Fixes #121

No impact on user.

Type of change

• [x] Enhancement (non-breaking change which improves an existing functionality).

Detailed scenario

Check #121 and here https://wp-media.slack.com/archives/C05NH7JU4S2/p1719573044181989

Technical description

Add comment field to json file and display comments on cli during test.

Documentation

Mandatory Checklist

Code validation

• [x] I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• [x] I triggered all changed lines of code at least once without new errors/warnings/notices.

Code style

• [x] I wrote a self-explanatory code about what it does.
• [x] I did not introduce unnecessary complexity.

[MathieuLamiot]

@wp-media/qa-team Would this approach be useful for you to get/put more details about the templates? (see the original GH issue for context)

[hanna-meda]

@MathieuLamiot, @Khadreal, This approach looks good to us. Thank you!