CONTRIBUTING.md

Rama main · réplica de lectura del repositorio original.

# Contributing to flowcraft
```bash
git clone https://github.com/thehypewipe/flowcraft.git
cd flowcraft
py -m pip install -e ".[dev]"
py -m pytest -q
py -m uvicorn flowcraft.main:app --reload  # backend at http://127.0.0.1:8000/docs
cd frontend && npm install && npm run dev  # UI at http://127.0.0.1:5173
```
- Add node type in `backend/flowcraft/engine.py`
- Add UI node in `frontend/src/App.tsx`
```