Replace Taxi & Rideshare TV & Top categories with "Cars" or "Automobiles"

[jayshao]

Currently we have:

Taxi & Rideshare TV	Advertising displays placed inside taxis and rideshare vehicles visible to passengers in the back seat.	103	transit.taxi_rideshare_tv
Taxi & Rideshare Top	Advertising displays placed on top of taxi and rideshare vehicles visible to nearby pedestrian and drivers.	104	transit.taxi_rideshare_top

It would be nice to normalize with our other categories to have Taxi/Rideshare have a master-category - and to be able to have "inside" "outside" and maybe "platform" (if we think taxi-queues or other loading areas are an advertising area) in line with the rest of transit