feat: add ci

[NachoVazquez]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added/updated (for bug fixes/features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no API changes)
[ ] Build related changes
[x] CI-related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

The repository needs CI workflow to check that everything is working as expected.

What is the new behavior?

After every push, the CI checks that everything is working as expected.

Does this PR introduce a breaking change?

[ ] Yes
[x] No