Ball Python 0.3.0

Python package 0.3.0

• Rebuilt on pybind11 C++ bindings (replaces CFFI).
• Pre-built wheels for CPython 3.9–3.13 on Linux (x86_64, aarch64), macOS (x86_64, arm64), and Windows (AMD64).
• Adds MDF class and mcvm function.
• Fixes MSVC compilation (VLA → malloc in kbd.c / utilities.c).

Install: pip install --upgrade Ball==0.3.0