Add a usable nuclear charge to every map

[Ikea]

make needing to set off the nuke require some key that only the authentication disk has

I don't like nerfs but I can at the very least agree to this. BUT. Make sure it's just the headpass. I think that'd work since if you're tampering with the same tools you need, to plant a nuclear charge on the station, spoofing SU and packet sniffing for the headpass makes enough sense. It IS a bit ridiculous that it's more technically in-depth to call a shuttle or transmit messages to centcom than it is to arm a nuclear charge.

Otherwise adding a self destruct sequence to every map is something I fully support because it is awesome and badass.

I don't consider this really a meaningful nerf to triggering one. Since hemera has it's own key/disk and you're already going there, if you're using a mechscanned off station nuke it's not practically more difficult as you just need to grab one additional item from the place you're already going. Headpass iirc you can get by just having a security officers ID and a little bit of work or the HoS disk so I'd dislike that being the thing that sets it off as it feels the most fitting for this to be an auth disk thing and people would just default to those as they're easier. This does make deactivation easier but honestly I never liked the current thing of "two minutes with no way to deactivate it besides more packet stuff or pulling an explosion out of nowhere".

A change to make sure the auth disk is always in "play" (something like a disk tracker in a hacked uniform fabricator and a disk is automatically mailed to the station if there isn't one/its off station for too long) could be needed but that is additional scope.