add duders to the party

Assets/Scripts/HeroUnit.cs

@@ -13,4 +13,16 @@ public class HeroUnit : MonoBehaviour
     [SerializeField] private long level;
     [SerializeField] private long xp;
     [SerializeField] private HeroAttributesSO attrs;
+    [SerializeField] private HeroPartySO party;
+
+    private void OnEnable()
+    {
+        // NOTE(zeph): Party is mandatory. If none is set, we want an exception.
+        party.Add(this);
+    }
+
+    private void OnDisable()
+    {
+        party.Remove(this);
+    }
 }