feat: Enhance payment processing with UI configuration and cancellation support

- Added doPaymentWithUI method to handle payments with customizable UI options.
- Implemented cancellation management for ongoing payment operations.
- Introduced configureUI method for global UI settings including custom messages and behavior.
- Updated App component to utilize new payment hooks and UI state management.
- Added utility functions for currency formatting and standardized payment requests.
- Enhanced error handling and logging throughout the payment process.

Author: mCodex