Adds Atmos Bags (credit to KingFroozy) (#18354)

* bags

* roundstart bags

Resources/Prototypes/Entities/Clothing/Back/backpacks.yml

@@ -78,6 +78,15 @@
   - type: Sprite
     sprite: Clothing/Back/Backpacks/engineering.rsi
 
+- type: entity
+  parent: ClothingBackpack
+  id: ClothingBackpackAtmospherics
+  name: atmospherics backpack
+  description: It's a backpack made of fire resistant fibers. Smells like plasma.
+  components:
+  - type: Sprite
+    sprite: Clothing/Back/Backpacks/atmospherics.rsi
+
 - type: entity
   parent: ClothingBackpack
   id: ClothingBackpackMedical

Resources/Prototypes/Entities/Clothing/Back/duffel.yml

@@ -39,6 +39,15 @@
   - type: Sprite
     sprite: Clothing/Back/Duffels/engineering.rsi
 
+- type: entity
+  parent: ClothingBackpackDuffel
+  id: ClothingBackpackDuffelAtmospherics
+  name: atmospherics duffel bag
+  description: A large duffel bag made of fire resistant fibers. Smells like plasma.
+  components:
+  - type: Sprite
+    sprite: Clothing/Back/Duffels/atmospherics.rsi
+
 - type: entity
   parent: ClothingBackpackDuffel
   id: ClothingBackpackDuffelMedical

Resources/Prototypes/Entities/Clothing/Back/satchel.yml

@@ -45,6 +45,15 @@
   - type: Sprite
     sprite: Clothing/Back/Satchels/engineering.rsi
 
+- type: entity
+  parent: ClothingBackpackSatchel
+  id: ClothingBackpackSatchelAtmospherics
+  name: atmospherics satchel
+  description: A tough satchel made of fire resistant fibers. Smells like plasma.
+  components:
+  - type: Sprite
+    sprite: Clothing/Back/Satchels/atmospherics.rsi
+
 - type: entity
   parent: ClothingBackpackSatchel
   id: ClothingBackpackSatchelClown