Add pytest test runner script

[binrogithub]

Motivation

• Provide a simple, reusable wrapper to run the project's test suite with pytest.

Description

• Add an executable scripts/test.sh that sets set -euo pipefail and invokes python -m pytest -q.

Testing

• Ran python -m pytest -q; test collection failed in this environment due to legacy Python 2 dependencies and missing mod_python, producing errors including ModuleNotFoundError: No module named 'mod_python', ValueError: Python 2.x version 2.4 or better is required, and a SyntaxError for the legacy except Exception, e syntax.

---

Codex Task