Idea: adding a progress bar

[Chemaclass]

🔖 Changes

This is a WIP experiment. I am still not sure how do I want to display the progress of the running testsuite. It might be with a progress bar (this PR) or it might be with a percentage instead somewhere else.

The aim for this PR is to try around this shload script and see if it can fit well in our library.

✅ To-do list

• [ ] I updated the CHANGELOG.md to reflect the new feature or fix
• [ ] I updated the documentation to reflect the changes