See currently running tests in nextest

@sunshowers.io told me that nextest has keyboard bindings!

You can press t to see the currently running tests and their output. You can get the same information by sending SIGINFO (on Darwin) or SUGUSR1 (any Unix) to nextest. On Macs, Ctrl-t sends SIGINFO, hence the choice of the t binding.

Official docs: https://nexte.st/changelog/#interactive-test-state-querying