- Add --force-reasoning CLI flag to force thinking mode for models like qwen3 coder
- Add check_force_reasoning() function to determine if reasoning should be forced
- Modify QwenParser to extract thinking/reasoning content instead of stripping it
- Add reasoning field to response message in non-streaming chat completions
- Prepend reasoning content to generated text in streaming responses
- Update OpenAIFormatter to include reasoning in response when available