Add a usable nuclear charge to every map

[Ikea]

This change technically requires a few changes in a trenchcoat I think to really work. First off, make needing to set off the nuke require some key that only the authentication disk has. The hemera nuclear charge has a separate key with its own password, any nuke that is mechscanned keeps the same key. This means you can still mechscan the off station nuke and activate that however to trigger the on station one you need the authentication disk. The nuclear charge should always be in a secure place, be it the armory or the computer core, and it shouldn't be connected to the grid (just a terminal). Also the nuclear charge should probably have its minimum time to destroy increased (like 5 minutes?), and also be destroyable just by hitting it similar to the nukies nuke.

This means that with both the auth disk in hand, and if you break into the secure place and connect the nuke you can activate the nuclear charge. In order for the nuke to go off it requires stealing/breaking into two fairly secure things then defending it for several minutes so I think it can be fairly balanced. That or just use it as a distraction to get security to focus on something. It also gives more weight to the auth disk and makes losing it a potentially big deal even without nukies which I also think is neat and also opens up a less nerdy way but difficult to pull off method of destroying the station