Add explosive cord. (#25875)

Content.Server/ExCable/ExCableNodeGroup.cs

@@ -0,0 +1,14 @@
+using Content.Server.NodeContainer.NodeGroups;
+using Content.Shared.NodeContainer.NodeGroups;
+using Content.Server.Power.Components;
+using Content.Server.Power.EntitySystems;
+
+namespace Content.Server.ExCable;
+
+/// <summary>
+/// Dummy Node group class for handling the explosive cables.
+/// </summary>
+[NodeGroup(NodeGroupID.ExCable)]
+public sealed class ExCableNodeGroup : BaseNodeGroup
+{
+}