Calendar integration

I don’t know if the apis exist but would be great if the app could see into my calendar and find the address of the event I’m driving to and ask me if I want to go there. Copy/pasting locations once I’m in the car is a bit clumsy.

Start by identifying the app's platform and the entry points for calendar access, since the issue does not name files, APIs, or tests. Determine whether calendar events can provide destination addresses and how the app should prompt the driver; the work is done when this behavior is implemented and validated.

Written by the indexing model from the issue text.