Refactor: chalking and refactor

[danielherrerohernando]

What’s the focus of this PR

Adding chalk to output and quick refactor.

How to review this PR

Review index.js and modules structure.

Before submitting this PR, I made sure:

• [x] The code builds clean without any errors or warnings

[danielherrerohernando]

Also, this PR allows checking CI testing on PRs too, so it won´t be possible to merge a branch not passing our test suite.