- Added `NativeClient` for non-WASM environments with automatic reconnection and message handling.
- Introduced `WasmClient` for WASM environments, supporting WebSocket communication and reconnection logic.
- Created protocol definitions for `SignRequest` and `SignResponse` with serialization and deserialization.
- Developed integration tests for the client functionality and sign request handling.
- Implemented WASM-specific tests to ensure compatibility and functionality in browser environments.
