- Added new methods for handling giveaways: `giveaway_premium` and `giveaway_stars`.
- Refactored existing purchase methods into separate files: `purchase_premium.py` and `purchase_stars.py`.
- Removed old premium and stars methods from the codebase.
- Updated `__init__.py` to include new giveaway methods in the public API.
- Introduced new result types for giveaways: `PremiumGiveawayResult` and `StarsGiveawayResult`.
- Updated constants for new giveaway pages.
- Enhanced error handling for configuration and user validation in giveaway methods.
- Updated tests to cover new functionality and refactored existing tests to match new method locations.
- Renamed the package from `fragmentapi` to `pyfragment` across all modules and tests.
- Removed the old wallet utility functions and replaced them with new implementations.
- Updated the `pyproject.toml` to reflect the new package name and repository links.
- Adjusted all import statements in tests to use the new package name.
- Implemented new methods for gifting Telegram Premium, Stars, and topping up TON balance.
- Added exception handling for various error scenarios in the API interactions.
- Created new utility functions for handling HTTP requests and decoding payloads.
- Established a clear structure for types and constants used throughout the library.