Welding airlocks changes their layer (#13440)

Content.Server/Tools/Components/LayerChangeOnWeldComponent.cs

@@ -0,0 +1,17 @@
+using Content.Server.Tools.Systems;
+using Content.Shared.Physics;
+
+namespace Content.Server.Tools.Components;
+
+[RegisterComponent]
+[Access(typeof(WeldableSystem))]
+public sealed class LayerChangeOnWeldComponent : Component
+{
+    [DataField("unWeldedLayer")]
+    [ViewVariables]
+    public CollisionGroup UnWeldedLayer = CollisionGroup.AirlockLayer;
+
+    [DataField("weldedLayer")]
+    [ViewVariables]
+    public CollisionGroup WeldedLayer = CollisionGroup.WallLayer;
+}