Airlock visuals (#7261)

Content.Shared/AirlockPainter/Prototypes/AirlockGroupPrototype.cs

@@ -0,0 +1,20 @@
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.AirlockPainter.Prototypes
+{
+    [Prototype("AirlockGroup")]
+    public sealed class AirlockGroupPrototype : IPrototype
+    {
+        [IdDataField]
+        public string ID { get; } = default!;
+
+        [DataField("stylePaths")]
+        public Dictionary<string, string> StylePaths = default!;
+
+        // The priority determines, which sprite is used when showing
+        // the icon for a style in the airlock painter UI. The highest priority
+        // gets shown.
+        [DataField("iconPriority")]
+        public int IconPriority = 0;
+    }
+}