Refactoring The Notification Section

[OM3X4]

Refactoring the notification to:

• check if this message is sent to the user before
• Switch to use "sonner" to handle notification logic efficiently
• Use gradient instead of images to improve loading time
• Move all the logic to "NotificationToast.tsx" to keep "App.tsx" clean and minimal

[URAYUSHJAIN]

@OM3X4 i can try this

[OM3X4]

I have made it myself> @OM3X4 i can try this