Setup CI

[hugorbarbosa]

• Add GitHub workflow for CI
• Update Pull Request template
• Update README

Pull request checklist:

• The changes proposed are described in the pull request.
• New code is properly tested.
• New code is properly documented.
• If applicable, the issue related to this pull request is referenced.
• If applicable, the project documentation is updated (architecture diagrams, user guides, etc).

Refer to the Contributing guide for more details.