[MERGED PR] Adds the Security Assistant job

[stagda]

30 rounds seems way too high in my opinion. If sec assistant is already locked behind 5 rounds, is it possible to make it so there has to be 8 rounds as sec assistant to unlock sec officer? That would still be 13 hours but would require 8 of those to be a sec assistant. Personally I don't know how, especially on RP, someone wouldn't be ready to be a sec officer after 8 (generally 2 hour) rounds in a junior role.