[calendar][agenda] Feature Request: alert of calendar events

I was looking into amazfish implementation and I have realized that Bangle.js doesn't provide alert of calendar events when disconnected from phone. I suggest extending this interface
https://github.com/espruino/EspruinoDocs/blob/f1ccca37e9c2f36d089ba46290f5c1b3cd3021c9/info/Gadgetbridge.md?plain=1#L214
by "alertTime" which can have undefined value (alert isn't set in calendar).

I can provide proof of concept implementation in Amazfish if needed for tests, but I am not able to update gadgetbridge or bangle.js it self. I am not sure where to start to implement alert popup.