Fire alarms, extinguishers, intercoms + Fixes #5422, #5440 & #5441

Draws some pipes through doors or other more convenient objects than walls, mostly affects cargo maintenance.
Adds vents/scrubbers to the surgery storages.
Ensures that each shutter divided section in the primary hallways have at least one fire alarm, extinguisher and intercom. Also tries to group them together so that if you see one you can expect the rest.
Decorates various rooms around the station with fire alarms, due to (hopefully) increased fun (and because it makes sense, seeing how dangerous a fire supposedly is on a space station).
Adds an AI holopad to the HoS office, seeing how all other heads of staff could have the AI's company.
Relocates the holopad in the library slightly because it was annoying to see it on a carpet.

Fixes #5440 by giving the botany lockers in Xenofauna storage the same access requirements as the door.

Fixes #5441 by ensuring you need either Atmos or Engineering access, not both

An APC in the medbay lobby is now connected to the grid again.

Removes troublesome emergency shutters in xenobiology and adds another air alarm in medbay.