[Improvement task]: Improve genezio addClass output

[andreia-oca]

Describe your task

The output for genezio addClass should be improved, especially the error messages. RIght now, the messages are a bit misleading.

For example, the following output is misleading because it does not have all the information required to fix the issue:

$ genezio addClass myClass
Please provide a class name with a valid class extension.

This error message should also indicate that genezio addClass expects a filename that contains a supported extension (.ts, .js and .dart).

[bhavyastar]

Hey @andreia-oca , I would like to work on this issue.

[andreia-oca]

@bhavyastar That's great news! 🎉 Feel free to fork this repository and make a PR with the change. You can pick me as a reviewer. I'll assign you to this task so everyone contributing to genezio will know that you're working on this.

You can check out our contributing guide. If you have any questions or need further guidance, I am one message away 😄

[bhavyastar]

Sure.