Add NPCs riding vehicles with related AI - DONE MOSTLY (going to track additional AI changes separately)
Ammo Selection

• Auto select ammo type once the first ammo DONE
• limit ammo selection GUI to display only ammo that's actually loaded in vehicle DONE
• highlight the fact there's no ammo loaded in vehicle HUD DONE
  HUD - going to track separately
• simplify/remove unnecessary information
• add keybind information in HUD (when a key or combination of keys is pressed)

When you say "riding" vehicles, does that include being able to shoot the ballistae, catapults and cannons etc?

Yes it does as well as aiming and moving vehicles around if movable

Closing, most of the stuff is going to be released shortly and the remaining I have created separate epics for.