added boss (final commit)

Assets/Code/Gameplay/BossTrigger.cs

@@ -0,0 +1,23 @@
+using Code.Gameplay.Player;
+using UnityEngine;
+
+namespace Code.Gameplay
+{
+    public class BossTrigger: MonoBehaviour
+    {
+        private bool _triggered;
+        private void OnTriggerEnter2D(Collider2D other)
+        {
+            if (!other.CompareTag("Player") || _triggered) return;
+            
+            Instantiate(Resources.Load<GameObject>("Prefabs/Boss"));
+            _triggered = true;
+        }
+
+        private void Update()
+        {
+            if (_triggered && FindFirstObjectByType<PlayerMovement>().gameObject.transform.position.x > transform.position.x + 10)
+                GetComponent<Collider2D>().isTrigger = false;
+        }
+    }
+}