Add engine turn on/off

[josecarre]

Is your feature request related to a problem? Please describe.
No, my only problem is winter :). I use volvo app to start engine so that my xc60 recharge is host when using it in the mornings, I;d just like this API endpoints to be added in the volvo to mqtt integration. I have manual integration calling the APIs via node-red... but having all here would be better to rest of users that doesnt know how to implement it.

Describe the solution you'd like
Add a switch to start/stop engine, with a timer selector. API details here: https://developer.volvocars.com/apis/connected-vehicle/v2/endpoints/engine/

Describe alternatives you've considered
I've implementes my own API calls via node-red, and integrated in home assistant but... is better ot have all together... and also to give support to users who dont have the knowledge.

Additional context
Congrats about this integration, it works really well :), but it would be nice to have all that the API supports here :)