extended usable Items with UsableItem

Assets/Scripts/Item.cs

@@ -1,17 +1,22 @@
+using System;
 using UnityEngine;
 
-public class Item : MonoBehaviour {
-    private string displayName;
-    private string description;
-    private int id;  //TODO: create an actual ID System that makes snens
+public class Item : MonoBehaviour, IComparable<Item> {
+    private readonly string displayName;
+    private readonly string description;
+    private readonly int id;  //TODO: create an actual ID System that makes snens
     public SpriteRenderer spriteRenderer;
     public Sprite selectedSprite;
     public Sprite defaultSprite;
-
+    
     public Item(string displayName, string description, int id) {
         this.displayName = displayName;
         this.description = description;
         this.id = id;
         spriteRenderer.sprite ??= defaultSprite;   // defaultSprite is set in UnityEditor
     }
+
+    public int CompareTo(Item other) {
+        return this.id - other.id;
+    }
 }