Fixes #6130

The construction outpost now has an air supply and rudimentary distribution system.
Glass and wood stacks are filled to their max stack sizes, 50 and 32 sheets respectively.
Ghosts can now teleport to Z-level 4.

There are now special air alarms which do not broadcast their alarms. These are used in the mass driver areas to let crew know when it's safe to use them again.
These air alarms have also been installed in the Research isolation cells to finally allow scientists to check what's up, at least as long as they are in there or have AI assistance.
Optimization of machinery sort?
Now mecha area denial feedback is closer to 5 seconds apart then ever.
Based on https://github.com/tgstation/-tg-station/pull/4562 and adapted to BS12 shuttle code. Credit to @Ikarrus.
Merge pull request #6134 from PsiOmegaDelta/Construction

Fixes #6130
Merge pull request #6159 from PsiOmegaDelta/MachineSort

Optimization of machinery sort?
Merge pull request #6160 from PsiOmegaDelta/DecaSeconds

Increased mecha area-denial feedback interval
Merge pull request #6161 from PsiOmegaDelta/RoundEnd

Extended round end feedback
Merge remote-tracking branch 'upstream/dev' into StatusDisplay. Moved code in New() into initialize().