Holofan Projector Upstream from Nyano (#8352)

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Resources/Prototypes/Entities/Objects/Devices/holoprojectors.yml

@@ -0,0 +1,23 @@
+- type: entity
+  parent: BaseItem
+  id: Holoprojector
+  name: holographic sign projector
+  description: A handy-dandy holographic projector that displays a janitorial sign.
+  components:
+  - type: HolosignProjector
+  - type: Sprite
+    sprite: Objects/Devices/Holoprojectors/custodial.rsi
+    state: icon
+
+- type: entity
+  parent: Holoprojector
+  id: HolofanProjector
+  name: holofan projector
+  description: Stop suicidal passengers from killing everyone during atmos emergencies.
+  components:
+  - type: HolosignProjector
+    signProto: HoloFan
+    rechargeTime: 120
+  - type: Sprite
+    sprite: Objects/Devices/Holoprojectors/atmos.rsi
+    state: icon

Resources/Prototypes/Entities/Structures/Holographic/projections.yml

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+- type: entity
+  id: HolosignWetFloor
+  name: wet floor sign
+  description: The words flicker as if they mean nothing.
+  components:
+  - type: Physics
+    bodyType: Static
+  - type: Sprite
+    sprite: Structures/Holo/wetfloor.rsi
+    state: icon
+    netsync: false
+  - type: TimedDespawn
+    lifetime: 30
+
+- type: entity
+  id: HoloFan
+  parent: HolosignWetFloor
+  name: holofan
+  description: A barrier of hard light that blocks air, but nothing else.
+  components:
+  - type: Sprite
+    sprite: Structures/Holo/holofan.rsi
+    state: icon
+    netsync: false
+  - type: Fixtures
+    fixtures:
+    - shape:
+        !type:PhysShapeAabb
+          bounds: "-0.5,-0.5,0.5,0.5"
+  - type: TimedDespawn
+    lifetime: 180
+  - type: Airtight
+    noAirWhenFullyAirBlocked: false