Adds hand labelers (#4903)

* Adds hand labelers

* Removes unnecessary thing

* Docs

* Reverts some changes

* Addresses comments and adds inhand sprites

* Addressed comments

Co-authored-by: Watermelon914 <3052169-Watermelon914@users.noreply.gitlab.com>

Content.Server/HandLabeler/Components/HandLabelerComponent.cs

@@ -0,0 +1,26 @@
+using System;
+using Content.Server.Items;
+using Content.Shared.Whitelist;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.HandLabeler.Components
+{
+    [RegisterComponent]
+    public class HandLabelerComponent : Component
+    {
+        public override string Name => "HandLabeler";
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("assignedLabel")]
+        public string AssignedLabel { get; set; } = string.Empty;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("maxLabelChars")]
+        public int MaxLabelChars { get; set; } = 50;
+
+        [DataField("whitelist")]
+        public EntityWhitelist Whitelist = new();
+    }
+}