Pauses for seconds, driving chromote's child event loop so timers
scheduled on it (e.g. recording capture) keep firing during the wait.
Never sleeps without pumping the loop.
Examples
if (FALSE) { # paparazzi:::examples_run()
page <- pz_open(pz_example("tasks"))
# A fixed pause; prefer an expectation or wait_for function when you
# know what you're waiting for
page |>
pz_act_click("#toggle-help") |>
pz_wait(0.5)
pz_close(page)
}
