Add persistent and seconds methods to Toast notification

[tabuna]

What’s New

This PR introduces two new methods to improve the Toast notification system:

• persistent(bool $persistent = true): Prevents the toast from auto-hiding, keeping it visible until dismissed manually.
• seconds(int $seconds): Allows setting the toast delay in seconds instead of milliseconds for better readability.

Why?

These additions provide more flexibility in managing toast notifications, making it easier to configure their behavior without manually handling milliseconds or overriding auto-hide settings.

Changes

• Added the persistent method to toggle auto-hide behavior.
• Added the seconds method to simplify delay configuration.
• Added/updated test cases to ensure proper functionality.

How to Test

Run the test suite to verify that toast notifications behave as expected with the new methods.

This update improves usability while maintaining backward compatibility. 🚀