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.Server/Storage/ItemCounterSystem.cs

@@ -0,0 +1,41 @@
+using System.Collections.Generic;
+using Content.Server.Storage.Components;
+using Content.Shared.Storage.ItemCounter;
+using JetBrains.Annotations;
+using Robust.Shared.Containers;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Storage
+{
+    [UsedImplicitly]
+    public class ItemCounterSystem : SharedItemCounterSystem
+    {
+        protected override bool TryGetContainer(ContainerModifiedMessage msg,
+            ItemCounterComponent itemCounter,
+            out IReadOnlyList<string> showLayers)
+        {
+            if (msg.Container.Owner.TryGetComponent(out ServerStorageComponent? component))
+            {
+                var containedLayers = component.StoredEntities ?? new List<IEntity>();
+                var list = new List<string>();
+                foreach (var mapLayerData in itemCounter.MapLayers.Values)
+                {
+                    foreach (var entity in containedLayers)
+                    {
+                        if (mapLayerData.Whitelist.IsValid(entity))
+                        {
+                            list.Add(mapLayerData.Layer);
+                            break;
+                        }
+                    }
+                }
+
+                showLayers = list;
+                return true;
+            }
+
+            showLayers = new List<string>();
+            return false;
+        }
+    }
+}