[MERGED PR] Gives captain a mindshield

[Retrino]

said this on the pr itself already, but not really a fan of blanket fixing the issue of mindhacks being super powerful instant click items by giving more mindshield implants to roles capable of causing more damage. the captain is a fairly strong person on station, all access opens up a lot of doors (not to mention their gun/sword), but the hop could very easily fall into this hole if the captain is phased out.

i do like that the pr makes the captain a more trustable person, though. just wish there were more ways to do it