Feature Request "is measuring"

I use a bmp in a battery operated node which sends measurement data over an rf network. I use forced mode since this node spends most of its time asleep. As such, I'd like to trigger a forced measurement, then check periodically for the measurement to complete while allowing background network tasks to complete. So a function like bmp.isMeasuring() would be super useful in my application.

Start by locating the BMP280 library's forced-mode measurement flow and how completion is currently detected. Check the public API and related examples, if present, then treat the work as done when callers can poll measurement completion without blocking background network tasks.

Written by the indexing model from the issue text.