v0.1.0 - first release

ReAct agents on open-weight LLMs.
- ReAct loop with forgiving Thought/Action/Observation parser
- 5 tools: calculator, python_repl (sandboxed), web_search, sql, rag
- HFLLM and QuantizedHFLLM (via turboquant-ml)
- Conversation + persistent SQLite memory
- Eval: task_completion, final_answer_match, tool_accuracy, step_efficiency
- FastAPI + Typer CLI