Adds functionality to empty a transit pod or put mobs in one

Clicking on a transit station with a grab or harm intent will cause you to attempt to empty the contents of the pod onto the floor, takes 4 seconds

Clicking on a transit station with a grab item in the aggressive state or above will cause you to attempt to stuff the grabbed mob into the pod, takes 6 seconds

Attempted fix of #1997, although the AI will require assistance from a crew member