[feature] Python bindings via PyO3

[martinadamsdev]

Summary

Would there be interest in Python bindings for casbin-rs using PyO3?

Motivation

• The existing pure-Python pycasbin works well, but a Rust-backed binding would offer significantly better enforcement throughput for high-traffic services.
• PyO3 + maturin makes it straightforward to publish a pip install-able wheel to PyPI.
• Other Rust projects (e.g., pydantic-core, ruff, polars) have demonstrated this pattern successfully.

Rough Scope

1. A PyO3 wrapper around the core casbin API — Enforcer, model/policy loading, enforce(), RBAC role management.
2. Publish to PyPI with pre-built wheels for Linux / macOS / Windows via maturin + GitHub Actions.

Questions for the Community

• Is this something people would find useful?
• Should it live in this repo (as a workspace crate) or in a separate repo?
• Which subset of the API would be most valuable to expose first?
• Anyone interested in collaborating on this?