salvage magnet status indicator (#12585)

Content.Shared/Salvage/SharedSalvageMagnetComponent.cs

@@ -0,0 +1,15 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Salvage;
+
+public abstract class SharedSalvageMagnetComponent : Component {}
+
+[Serializable, NetSerializable]
+public enum SalvageMagnetVisuals : byte
+{
+    ChargeState,
+    Ready,
+    ReadyBlinking,
+    Unready,
+    UnreadyBlinking
+}