Added mapped storage for things like crayon belts and tools (#4201)

* Added mapped storage for things like crayon belts and tools

* Attempt to get StorageFillEvent to work

* Managed to get it working with Visualizer logi

* Improved PR and did some light refactoring of components

* Update Content.Client/Storage/Visualizers/MappedItemVisualizer.cs

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

* Removed event, went with stateful ApperanceData

* Removed ids in favor of whitelist

* Refactor YAML, Moved functionality to Shared and renamed it.

* Changed so insert/remove always send full state.

* Move logic to component

* Fix some issues on MappedVisualizer and few nitpicks

- Fix mapped visualizer only doing init or update layers
- Fixed naming of systems
- Fixed sort of crayons

* Forgot to apply Vera's suggestion

* Fix the data to be more strict and to avoid unnecessary clearing

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Shared/Storage/ItemCounter/SharedItemCounterSystem.cs

@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using Robust.Shared.Containers;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Storage.ItemCounter
+{
+    [UsedImplicitly]
+    public abstract class SharedItemCounterSystem : EntitySystem
+    {
+        /// <inheritdoc />
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<ItemCounterComponent, ComponentInit>(InitLayers);
+            SubscribeLocalEvent<ItemCounterComponent, EntInsertedIntoContainerMessage>(HandleEntityInsert);
+            SubscribeLocalEvent<ItemCounterComponent, EntRemovedFromContainerMessage>(HandleEntityRemoved);
+        }
+
+        private void InitLayers(EntityUid uid, ItemCounterComponent 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 HandleEntityRemoved(EntityUid uid, ItemCounterComponent itemCounter,
+            EntRemovedFromContainerMessage args)
+        {
+            if (itemCounter.Owner.TryGetComponent(out SharedAppearanceComponent? appearanceComponent)
+                && TryGetContainer(args, itemCounter, out var containedLayers))
+            {
+                appearanceComponent.SetData(StorageMapVisuals.LayerChanged, new ShowLayerData(containedLayers));
+            }
+        }
+
+        private void HandleEntityInsert(EntityUid uid, ItemCounterComponent itemCounter,
+            EntInsertedIntoContainerMessage args)
+        {
+            if (itemCounter.Owner.TryGetComponent(out SharedAppearanceComponent? appearanceComponent)
+                && TryGetContainer(args, itemCounter, out var containedLayers))
+            {
+                appearanceComponent.SetData(StorageMapVisuals.LayerChanged, new ShowLayerData(containedLayers));
+            }
+        }
+
+        protected abstract bool TryGetContainer(ContainerModifiedMessage msg,
+            ItemCounterComponent itemCounter,
+            out IReadOnlyList<string> containedLayers);
+    }
+}