Alert when layer # reached

[nimble]

When I am printing a model which I know has a high risk of failure at a certain layer, I would like the X1-C (or the handy app) to notify me when that layer is reached - an audible alert for example.

This should be configurable for any number of “alert points” through the print.

[Filmgrip]

Alerts would also be amazing for things like inserting magnets into a print. i.e. “Pause at layer X and alert me”