Release v2.0.0 - Major Refactor with New Services and Improved API Client

[Bello-Ibrahm]

This pull request introduces version 2.0.0 of the unicodeveloper/laravel-paystack package, featuring a major refactor of the SDK to improve maintainability, scalability, and developer experience.

Key updates include:

• Introduction of dedicated service classes for all Paystack API domains (Transaction, Customer, Subscription, Plan, Page, SubAccount, Bank).
• Implementation of a robust PaystackClient to handle HTTP requests with centralized error handling.
• Addition of TransRef utility class for unique transaction reference generation.
• Consistent and comprehensive PHPDoc annotations for all services and methods.
• Facade updates to expose new services seamlessly.
• Improved exception handling and code organization following SOLID principles.
• Updated documentation and usage examples.
• Configurable retry logic to PaystackClient via retry_attempts and retry_delay in config/paystack.php.
• Unit and Integration Test

This release lays a solid foundation for easier maintenance, adopting stricter typing, method signatures, and future feature additions.

[Bello-Ibrahm]

Hello @unicodeveloper, Just checking in to see if you’ve had a chance to review this PR.
I’d be happy to adjust the implementation or documentation if needed to better align with the package’s direction. Thanks for your time and for maintaining this project!