Add atmos directional sign (#31155)

* Xeno walls

* Fix icon smoothing for the walls

* Added a bunch of items, and the map/shuttle

* Fixed construction graphs

* Put the map in the right place gosh

* Fix shuttle walls rusting, invalid IDs, latejoin cryo, deprecated properties

* Fix APC names and stuff

* Updated to v1.1

Resources/Prototypes/Entities/Structures/Wallmounts/Signs/signs.yml

@@ -16,6 +16,15 @@
     - type: Sprite
       snapCardinals: false
 
+- type: entity
+  parent: BaseSignDirectional
+  id: SignDirectionalAtmos
+  name: atmos sign
+  description: A direction sign, pointing out which way the Atmospherics department is.
+  components:
+  - type: Sprite
+    state: direction_atmos
+
 - type: entity
   parent: BaseSignDirectional
   id: SignDirectionalBar