Implementing to handle multiple notification

[deep60]

Here's what the implementation involves:

1. NotificationQueue: A new class that manages a queue of notifications:
   • Maintains a FIFO queue of notifications
   • Ensures notifications are presented sequentially
   • Handles automatic dismissal with duration
   • Manages the state of currently presenting notifications
2. NotificationPresenter Changes:
   • Added a notification queue instance
   • Modified presentation methods to utilize the queue
   • Updated dismissal to function with the queue
   • Maintains backward compatibility with the existing API
3. SwiftUI Integration:
   • Updated the SwiftUI modifier to operate with the queue
   • Improved state tracking for multiple notifications
   • Enhanced handling of notification IDs and state management