refactor: separate routes and controllers

[IkramBagban]

Desc:
This PR refactor the payment and webhook handler logic into seperate contrrollers instead of handling everything inside the routes.

• Moved payment logic from payment.routes.ts to a separate controller.
• Moved webhook logic from webhook.routes.ts to a separate controller.
• Updated routes to use the new controllers.
• Fixed some basic TypeScript errors in the code.

Why?

• Improves code maintainability and readability.
• Follows MVC architecture by keeping routes clean and handling business logic separately.
• Makes it easier to add new features or modify existing ones in the future.

[yashmakhija]

This branch has conflicts that need to be resolved. Please pull the latest code and fix the conflicts.

[IkramBagban]

done

This branch has conflicts that need to be resolved. Please pull the latest code and fix the conflicts.