We want to be able to leverage Quickstart's "watch tests as they execute" and other features that make running and debugging Selenium tests locally easier for Cypress too

Will need to do some exploring. Since Mediawiki's CI uses "npm run selenium-test", and even Cypress tests use that too, and that's what Quickstart calls, it probably makes sense to see if Quickstart's "./run_selenium_tests" script can itself can "just work" if a test is a Cypress one...