Cigarette ecs (#4495)

* Reorganized Shared.Storage folder

* Replace StorageCounter with Item Counter

* Change stack visuals setting data

* Fix mirrorcult suggestions

* Fix items from upstream

* Fix type formatting

Content.Shared/Storage/EntitySystems/SharedItemMapperSystem.cs

@@ -0,0 +1,54 @@
+using System.Collections.Generic;
+using Content.Shared.Storage.Components;
+using JetBrains.Annotations;
+using Robust.Shared.Containers;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Storage.EntitySystems
+{
+    [UsedImplicitly]
+    public abstract class SharedItemMapperSystem : EntitySystem
+    {
+        /// <inheritdoc />
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<ItemMapperComponent, ComponentInit>(InitLayers);
+            SubscribeLocalEvent<ItemMapperComponent, EntInsertedIntoContainerMessage>(MapperEntityInserted);
+            SubscribeLocalEvent<ItemMapperComponent, EntRemovedFromContainerMessage>(MapperEntityRemoved);
+        }
+
+        private void InitLayers(EntityUid uid, ItemMapperComponent component, ComponentInit args)
+        {
+            if (component.Owner.TryGetComponent(out SharedAppearanceComponent? appearanceComponent))
+            {
+                var list = new List<string>(component.MapLayers.Keys);
+                appearanceComponent.SetData(StorageMapVisuals.InitLayers, new ShowLayerData(list));
+            }
+        }
+
+        private void MapperEntityRemoved(EntityUid uid, ItemMapperComponent itemMapper,
+            EntRemovedFromContainerMessage args)
+        {
+            if (itemMapper.Owner.TryGetComponent(out SharedAppearanceComponent? appearanceComponent)
+                && TryGetLayers(args, itemMapper, out var containedLayers))
+            {
+                appearanceComponent.SetData(StorageMapVisuals.LayerChanged, new ShowLayerData(containedLayers));
+            }
+        }
+
+        private void MapperEntityInserted(EntityUid uid, ItemMapperComponent itemMapper,
+            EntInsertedIntoContainerMessage args)
+        {
+            if (itemMapper.Owner.TryGetComponent(out SharedAppearanceComponent? appearanceComponent)
+                && TryGetLayers(args, itemMapper, out var containedLayers))
+            {
+                appearanceComponent.SetData(StorageMapVisuals.LayerChanged, new ShowLayerData(containedLayers));
+            }
+        }
+
+        protected abstract bool TryGetLayers(ContainerModifiedMessage msg,
+            ItemMapperComponent itemMapper,
+            out IReadOnlyList<string> containedLayers);
+    }
+}