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/Controllers/PlayerController.cs

@@ -52,7 +52,7 @@ public class PlayerController : Character
 
     private void OnFireButtonPressed()
     {
-        if (_hammer == null)
+        if (_hammerThrower.CanThrow)
         {
             _animator.SetTrigger("Body_ThrowHammer");
         }
@@ -61,7 +61,7 @@ public class PlayerController : Character
     // Animation event
     public void ThrowHammerObject()
     {
-        _hammerThrower.ThrowHammer();
+        _hammerThrower.TryThrowHammer();
         UpdatePlayerSprite();
     }