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/Managers/NoiseSystem.cs

@@ -0,0 +1,63 @@
+using System;
+using UnityEngine;
+
+public class NoiseSystem : MonoBehaviour
+{
+    public static NoiseSystem Instance { get; private set; }
+
+    [SerializeField] private bool _debugMode = false;
+    [SerializeField] private LayerMask _enemyLayer = LayerMask.GetMask("Enemy");
+
+    public event EventHandler<NoiseEventArgs> OnNoiseEmitted;
+
+    private void Awake()
+    {
+        // Singleton pattern
+        if (Instance != null && Instance != this)
+        {
+            Destroy(gameObject);
+            return;
+        }
+
+        Instance = this;
+    }
+
+    public void Emit(Vector3 position, float radius)
+    {
+        if (_debugMode)
+            Debug.Log($"[NoiseSystem] Noise emitted at {position} with radius {radius}");
+
+        OnNoiseEmitted?.Invoke(this, new NoiseEventArgs { Position = position, Radius = radius });
+
+        // Find all enemies in range and notify them
+        Collider2D[] hitColliders = Physics2D.OverlapCircleAll(position, radius, _enemyLayer);
+
+        foreach (Collider2D collider in hitColliders)
+        {
+            var enemy = collider.GetComponent<EnemyAI>();
+            if (enemy != null)
+            {
+                enemy.OnNoise(position);
+
+                if (_debugMode)
+                    Debug.Log($"[NoiseSystem] Notified enemy at {collider.transform.position}");
+            }
+        }
+    }
+
+    private void OnDrawGizmosSelected()
+    {
+        // Debug visualization in editor
+        if (!_debugMode)
+            return;
+
+        Gizmos.color = Color.yellow;
+        // This would need to be called from a debug script to visualize noise spheres
+    }
+}
+
+public class NoiseEventArgs : EventArgs
+{
+    public Vector3 Position { get; set; }
+    public float Radius { get; set; }
+}