Refactor player and enemy scripts; remove unused classes and improve initialization

- Added base initialization call in PlayerController.
- Changed player reference in EnemyAI to be serialized for better inspector visibility.
- Ensured characters are initialized upon spawning in EnemySpawner.
- Removed obsolete EnemyAI and Chest scripts to streamline codebase.
- Added KeyChest script for key collection functionality.
- Introduced new meta files for better organization and tracking.
- Created launch configuration for Unity debugging.

Assets/Scripts/Utilities/Character.cs

@@ -37,7 +37,7 @@ public abstract class Character : MonoBehaviour
 
     public event EventHandler OnCharacterDeath;
 
-    private void Start()
+    public void Init()
     {
         _body = GetComponent<Rigidbody2D>();
         _capsuleCollider = GetComponent<CapsuleCollider2D>();