1.0.27

feat: Add comprehensive documentation and enhance library features

- Add complete API documentation for all public interfaces
- Implement comprehensive README with usage examples and best practices
- Add thread safety documentation and implementation notes
- Document all core components: APIClient, NetworkRouter, NetworkError
- Add detailed documentation for RetryHandler and DefaultRetryHandler
- Document SendablePromise with thread safety examples
- Add APIVersion documentation with usage patterns
- Document Data extensions with practical examples
- Add comprehensive NetworkParameterEncoding documentation
- Document HeaderHandler with type-safe header management