Pipes, cameras, air alarms, emergency shutters, and new maintenance area added.

Adds a number of missing supply pipes around the station.
Adds cameras to the new Hydrophonics/Garden and Xenoflora areas.
Adds an air alarm to one of the Hydrophonics areas, just fore of the new Garden.
Adds emergency shutters to the exterior windows of the Xenoflora lab.
The maintenance section port of the engine recycled another maintenance area, causing APC 'duplication'. Created new area instance.
Partially fixes #5422.

The button to activate the flash in the permabrig is now properly assigned with an id.
Would previously activate all un-tagged mounted/stationary flashes in the known universe.

The door button is still not functional, appears to be mapped as correctly as can be but I don't think doors (with access requirements) can currently be remote controlled the same way as shutters.
Merge pull request #5430 from PsiOmegaDelta/PAPC

Post-freeze-additions + partially fixes #5422