Mtbls 738 cypress first steps

[calstevemart]

this was a 'spike' intended to understand the basic concepts of Cypress and its use.
Some thoughts:

• Running cypress against the docker-compose localhost unreliable at this point in time. Auth requests hang and fail on the very first attempt (but not subsequently), sometimes network requests take too long and cause cypress timeout errors.
• Running cypress in CI/CD we should use www-test. This would also work for local editor changes - configure the editor to point towards www-test, and have cypress pointed at your local editor
• e2e tests intended to test features end to end rather than the whole application
• never the less I think there would be some benefit to creating a large test spec for a 'happy path' study creation and population, as a kind of automated sanity test.

There are a lot of boilerplate cypress tests and fixtures included in this PR. These were very useful during this initial phase and I think we can get rid of them once we have a healthy base of test specs of our own.