Dashboard e2e tests in CI

This is a very large issue.

General steps:

• Set up a cypress framework for running tests against the dashboard. #138 (closed)
• Run tests from Stackspin CI. stackspin#1536 (closed)
• Run tests in the dashboard CI. This is harder, because it requires some other components to function: single-sign-on-database, hydra, kratos at least. It also requires a cluster to install on, but we could re-use gitlab.stackspin.net which we already use for nextcloud in the same way.

Some possibilities of tests:

• Check that the documentation link is visible.
• Test the "Configure profile" modal a bit.
• Test the "Authentication settings" page a bit, i.e., the Kratos settings.
• In particular, enable TOTP and test logging in with TOTP, using cypress-otp.
• Check that some app tile is visible on the landing page. This is not trivial because we should make sure that that app is installed first if necessary.
• Test that the module menu items are visible. Ideally do this separately as admin and non-admin user because the results are different.
• Check that the Users module shows some user in the listing.
• Open a user configuration modal and check that some field in there is populated.
• Test creating a new user.
• Check that the Apps module shows some apps. Again this needs the app to be installed first.