RScore has a main to run tests

[TheoPannetier]

Fix:

• 16

Depends on:

• 15

  (please review & merge cmake_batch first!)

There is no reason for unit tests to be done through one of the interfaces - they should instead be run within the core code directly, so that we are confident that the tests hold true for all interfaces.

To enable this, I have written a simple main to allow RScore to run on its own without an interface. main only runs the unit tests, and exits with 0 if all tests complete successfully (or 1 otherwise). The tests themselves are only drafts so far, I will populate the test functions with unit tests this week.

Having RScore running on its own also enables continuous integration, so I deployed it (check.yml, see the successful build here).

[TheoPannetier]

main and GHA workflow have been deployed, but unit tests are not yet ready. Closing this for now!