feat(sdk): add Python SDK #12
Description
Summary
Create a Python SDK for the OCRBase API to complement the existing TypeScript SDK.
Motivation
- Python is widely used in data science, ML, and automation workflows where document processing is common
- Many potential users may prefer Python over TypeScript for their integrations
- Expands the reach of the API to a broader developer audience
Proposed Features
- Type-safe API client with Pydantic models
- Async support (httpx/aiohttp)
- Sync support for simpler use cases
- WebSocket support for real-time processing updates
- File upload handling
- Comprehensive error handling with custom exceptions
- Published to PyPI
Additional Context
The SDK should mirror the functionality of the existing TypeScript SDK in packages/sdk/.