Add player controller, state management, and input handling

- Implemented PlayerController.cs to manage player movement and actions.
- Created PlayerState.cs to track player lives, coins, and key status.
- Added CameraFollow.cs for smooth camera movement following the player.
- Developed Character.cs as an abstract class for character behavior.
- Introduced Enums.cs for defining TreasureType and MapElementType.
- Added IDoor interface for door interactions.
- Created InputActions.cs for handling player input actions.
- Implemented MainMenu.cs for basic menu functionality including play and exit options.

Assets/Scripts/EnvironmentObjects/Chest.cs

@@ -8,31 +8,43 @@ public class Chest : MonoBehaviour
     private TreasureSO _treasureSO;
 
     private Transform _treasureObject;
-    private bool _isOpen=false;
-
+    private bool _isOpen = false;
 
     private void Awake()
     {
-        _treasureObject=transform.GetChild(1);
-        var spriteRenderer=_treasureObject.GetComponent<SpriteRenderer>();
+        _treasureObject = transform.GetChild(1);
+        var spriteRenderer = _treasureObject.GetComponent<SpriteRenderer>();
 
         spriteRenderer.sprite = _treasureSO.Image;
     }
 
     private void OnTriggerEnter2D(Collider2D collider)
     {
-        var playerState=collider.GetComponent<PlayerState>();
+        var playerState = collider.GetComponent<PlayerState>();
         if (playerState != null && !_isOpen)
         {
             _isOpen = true;
             animator.SetTrigger("OpenChest");
+
             switch (_treasureSO.Treasure)
             {
                 case TreasureType.Coin:
                     playerState.AddCoin();
+                    if (GameManager.Instance != null)
+                    {
+                        GameManager.Instance.AddTreasure(1);
+                    }
                     break;
                 case TreasureType.Key:
                     playerState.SetKey();
+                    if (GameManager.Instance != null)
+                    {
+                        GameManager.Instance.SetKeyState(true);
+                    }
+                    if (LevelManager.Instance != null)
+                    {
+                        LevelManager.Instance.NotifyKeyCollected();
+                    }
                     break;
             }
         }