Python bindings with PyO3

Description

Create Python bindings to allow using velociplot from Python, targeting the matplotlib/plotly user base.

Goals

• Pythonic API
• NumPy integration
• Jupyter notebook support
• pip installable

Tasks

• Set up PyO3 bindings structure
• Expose core plot types
• NumPy array support
• Create Python package (pyproject.toml)
• Write Python documentation
• Publish to PyPI

Example API

```python import velociplot as vp

x = [1, 2, 3, 4, 5] y = [1, 4, 9, 16, 25]

vp.line(x, y, color="#3498db", output="plot.png") ```

Acceptance Criteria

• Clean Python API
• Performance comparable to native Rust
• Good documentation
• Published on PyPI