Adds the new spacesuit sprites. Adds a less IMMULSION-BREAKING description for the syndicate spacesuit/helmet.
Dynamic Headset Description

Headsets now generate a description of available radio channels based on the installed encryption key(s).
Currently only updates on creation, not when changing encryption keys, to ensure that less than legal keys are not detected by a mere casual glance.
Attempting to fix conflicts with the following files:
icons/mob/head.dmi
icons/mob/items_lefthand.dmi
icons/mob/items_righthand.dmi
Reverts baystation12.int.
Merge pull request #7043 from MrSnapwalk/onespacesuittwospacesuitredspacesuitbluespacesuit

Adds the new spacesuit sprites.
Merge pull request #7059 from PsiOmegaDelta/Headsets

Dynamic Headset Description
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into pgame-preferences