Show if items can be placed in a slot when hovering (#1480)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers@gmail.com>

Content.Client/GameObjects/Components/HUD/Inventory/InventoryInterfaceController.cs

@@ -59,6 +59,10 @@ namespace Content.Client.GameObjects
         {
         }
 
+        public virtual void HoverInSlot(EquipmentSlotDefines.Slots slot, IEntity entity, bool fits)
+        {
+        }
+
         public virtual void RemoveFromSlot(EquipmentSlotDefines.Slots slot)
         {
         }
@@ -95,5 +99,10 @@ namespace Content.Client.GameObjects
 
             Owner.SendOpenStorageUIMessage(slot);
         }
+
+        protected void RequestItemHover(EquipmentSlotDefines.Slots slot)
+        {
+            Owner.SendHoverMessage(slot);
+        }
     }
 }