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/ItemCounterComponent.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Shared.Storage.ItemCounter
+{
+    [RegisterComponent]
+    public class ItemCounterComponent : Component, ISerializationHooks
+    {
+        public override string Name => "ItemCounter";
+
+        [DataField("mapLayers")] public readonly Dictionary<string, SharedMapLayerData> MapLayers = new();
+
+        void ISerializationHooks.AfterDeserialization()
+        {
+            foreach (var (layerName, val) in MapLayers)
+            {
+                val.Layer = layerName;
+            }
+        }
+
+    }
+}