Adding `max_height`, `max_width`, and `max_weight` params to `mb_directions` function

[JaredStufft-Elion]

Allows the end user to supply maximum height, width, and weight in meters/metric tons to restrict road choices in routing results from mb_directions based on vehicle profile. This is useful when creating routes for commercial applications, such as logistics where the vehicle may not be able to take a planned route due to road restrictions.