Add GitHub Actions CI for running tests

[jacobwilliams]

Can use GitHub Actions for CI (run the tests, deploy documentation, etc.)

[jacobwilliams]

To have the test run in the CI, the read statement would need to be removed, and all the stop statements in the individual tests also. Replace with a loop to run them all.

[perazz]

Thanks, this is a good idea. The original tests aren't really testing much so my plan is to gradually implement them with the object-oriented interface, and know what data should be expected to compare against it