[MERGED PR] Gives captain a mindshield

[Emimiyu]

Ngl, health implant kinda need a tweak itself. Issue is it's becoming a mechanic that invites valid-hunt. I have seen half of medbay ran off to space diner just because an antag tried to kill one secoff and none of them even brought other security there. I agree with captain not starting with health implant cause you will be swarmed with medbay players "who got bored". There was a reasom why sec didn't get crit alert anymore, because it was too strong, but considering medbay will get notified anyway, I would prefer if the captain's mindshield don't include a health alert. So it is not fully strong and the captain can choose if they want a health implant or not.