Add utility AI (#806)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers@gmail.com>
Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>
Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Server/AI/WorldState/States/Inventory/InventoryState.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using Content.Server.GameObjects;
+using JetBrains.Annotations;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Server.AI.WorldState.States.Inventory
+{
+    [UsedImplicitly]
+    public sealed class InventoryState : StateData<List<IEntity>>
+    {
+        public override string Name => "Inventory";
+
+        public override List<IEntity> GetValue()
+        {
+            var inventory = new List<IEntity>();
+
+            if (Owner.TryGetComponent(out HandsComponent handsComponent))
+            {
+                foreach (var item in handsComponent.GetAllHeldItems())
+                {
+                    inventory.Add(item.Owner);
+                }
+            }
+
+            // TODO: InventoryComponent (Pockets were throwing)
+
+            return inventory;
+        }
+    }
+}