Quack MCP Server

# Add BasedPyright Static Analysis Support ## Summary This PR adds support for **basedpyright** static type analysis as an additional MCP tool alongside the existing mypy integration. BasedPyright provides faster type checking with enhanced features compared to standard pyright. ## Key Features - **Automatic Installation**: Detects and installs basedpyright if not available - **Configuration Detection**: Supports both `pyrightconfig.json` and `pyproject.toml` with verbose logging - **Severity Filtering**: Filter results by error/warning/info severity levels - **Top-N Limiting**: Limit output to most critical issues - **Robust Processing**: 3-retry mechanism with exponential backoff for reliability - **Comprehensive Testing**: Full test coverage including edge cases and error handling ## Implementation ### Core Components - `quack/processors/basedpyright.py` - Main processor implementation - `tests/processors/test_basedpyright_processor.py` - Comprehensive test suite ### Key Capabilities - Processes Python code through basedpyright with JSON output - Integrates with existing diagnostic filtering utilities - Handles installation, configuration detection, and error recovery - Provides structured output with line content and metadata ## Testing The implementation includes comprehensive tests covering: - ✅ Successful analysis with type errors - ✅ Clean code with no issues - ✅ Error handling (stderr errors, timeouts, invalid JSON) - ✅ Retry logic with exponential backoff - ✅ Process failure scenarios ## Usage BasedPyright analysis jobs can be processed through the existing job system, providing the same filtering and output format as other static analysis tools.