Visually groups / a tree hierarchy for tests #3535
Description
Idea from Arpad
introduce groups / a tree hierarchy for tests.
I think all test frameworks have some notion of hierarchy. for example in pytest, you have files, and then arbitrary nesting of class-based tests. In rust, you have a distinction between unit and a number of integration tests, and in there you also have arbitrarily nested modules.
It might be interesting to to show "module-level" statistics, and to maybe hide all the files/modules by default which have not had any failures, and execute very quickly.