Make ItemCabinet use ItemSlots (#4771)

* pda slot names

* cabinets use item slots

* fix yaml

* fix tests

Content.Shared/Containers/ItemSlot/SharedItemSlotsComponent.cs

@@ -2,6 +2,7 @@ using Content.Shared.Sound;
 using Content.Shared.Whitelist;
 using Robust.Shared.Containers;
 using Robust.Shared.GameObjects;
+using Robust.Shared.Localization;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization.Manager.Attributes;
 using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
@@ -31,9 +32,23 @@ namespace Content.Shared.Containers.ItemSlots
         [ViewVariables] [DataField("insertSound")] public SoundSpecifier? InsertSound;
         [ViewVariables] [DataField("ejectSound")] public SoundSpecifier? EjectSound;
 
+        /// <summary>
+        ///     The name of this item slot. This will be shown to the user in the verb menu.
+        /// </summary>
+        [ViewVariables] public string Name
+        {
+            get => _name != string.Empty
+                ? Loc.GetString(_name)
+                : ContainerSlot.ContainedEntity?.Name ?? string.Empty;
+            set => _name = value;
+        }
+        [DataField("name")] private string _name = string.Empty;
+
         [DataField("item", customTypeSerializer: typeof(PrototypeIdSerializer<EntityPrototype>))]
         [ViewVariables] public string? StartingItem;
 
         [ViewVariables] public ContainerSlot ContainerSlot = default!;
+
+        public bool HasEntity => ContainerSlot.ContainedEntity != null;
     }
 }