Add a CI/CD Pipeline

[lebrice]

Need to create a CI/CD pipeline. I'm currently considering doing it through GitHub Actions, as I've heard they are pretty versatile.

Todos:

• [ ] Running unit tests (should be pretty easy, since these don't really require a GPU to run)
• [ ] Running "integration" tests (which will probably be placed in the /tests folder), which would probably require a GPU to run.
• [ ] Reserve the sequoia handle on PyPI, assuming it is already available. Otherwise, figure out a handle to use.