Implement CI to run tests

[lukethehuman]

Related to #69

Implement a CI to run the test suite. Require the test suite passes for pull request to main to be approved.

One possible difficulty here would be setting up the environment to run cubit in the CI. Licensing would need to be set up correctly and we would likely need some containerised environment to run in which has a viable setup.

Another option would be to skip tests that required cubit during the CI, however I am unsure of the merit of only running tests that don't use cubit.