Refactor ExtinguisherCabinet->ItemCabinet and actually maps them in, adds EntityWhitelist (#4154)

* i probably shouldnt have done this in one commit

* map nonsense

* fix example code

* unnecessary

* test

* reviews

* little fix for open datafield

* add soul

Content.Shared/GameObjects/Components/ExtinguisherCabinet.cs

@@ -5,9 +5,9 @@ using Robust.Shared.Serialization;
 namespace Content.Shared.GameObjects.Components
 {
     [Serializable, NetSerializable]
-    public enum ExtinguisherCabinetVisuals
+    public enum ItemCabinetVisuals : byte
     {
         IsOpen,
-        ContainsExtinguisher
+        ContainsItem
     }
 }