- Add WeChatBotError enum for error handling with various error types.
- Create a Result type alias for easier error management.
- Implement ILinkClient for low-level API interactions including QR code generation, message sending, and updates retrieval.
- Define message types and structures for handling incoming messages and media content.
- Add tests for error handling and message parsing to ensure reliability.
Co-authored-by: Copilot <copilot@github.com>
