Add option to send next waypoint to car satnav (carplay)

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/request-a-feature/add-option-to-send-next-waypoint-to-car-satnav-carplay/
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Our car needs to know the next stop so it can: show arrows in the HUD, pre charge the battery, pre-emotive it slow down for junctions and so regenerate better.

There's a carplay API to allow apps to send a destination to the car: apple maps does it, and so does one other charge point location app (I forget which, there are so many on my phone…).

Could you do it too? avoids me having to try and replicate the plan's next destination every time I set off from a stop