Roof-box drag addition to advanced settings

[RonnieLast]

Description:  Feature Request to add roof-box drag to the advanced settings

Use Case: For infrequent long-journey travel planning, ABRP is invaluable for EV cars and these are also situations where roof-boxes are commonly utilised. 

I can offer to install a roof-box on my Kona 64 and perform some test drives to create a curve, then repeat the test with no roof-box and collect the same data for the curve. I will also provide the external silhouette dimensions for the roof-box.

Would ABRP be in a position to then to provide the described feature-request? If so, we can plan the test-drive duration and speeds afterwards.