Mobile pAIs.

Adds four new verbs to pAIs.
- Unfold, moving the pAI mob to the Real World and storing the card inside them.
- Fold up, the opposite.
- Choose Chassis, used to pick the mob sprite to use.
- Choose Speech Verbs, used to change how the mob sounds.

Mobile pAIs can be attacked with a device or barehanded to force them to fold back up, can move on tables and cannot open doors. I may add a holder proc to them before this is merged. It's probably going to break spectacularly under strain, but limited local testing hasn't shown any huge issues or errors (even doorjacking works, serendipitously).
Seems excessive to both have this and forceMove, since latter does it anyway.