VxPrint: add printer alerts when stopped #7515
Description
VxAdmin already has a printer_alert component and feature that warns the user when the printer is stopped for some reason (e.g. jammed). I believe it currently only warns when the printer is stopped, so wouldn't warn if toner is low. It also only shows for election managers, not system administrators.
In VxPrint, we want to warn for both election managers and poll workers, but we can continue excluding system administrators.
I suggest we leave the toner warning out for now. It's a little different than the printer being stopped, in that the user can continue to print for a while. Using a passive warning in the nav bar seems like enough for now, and we can introduce more warnings elsewhere later on if needed.