chrore: noxfile (#29)

noxfile.py

@@ -0,0 +1,21 @@
+import nox
+from nox.sessions import Session
+
+nox.options.default_venv_backend = "uv"
+nox.options.reuse_venv = True
+
+PYTHON_VERSIONS = ["3.10", "3.11", "3.12"]
+
+
+@nox.session(python=PYTHON_VERSIONS)  # type: ignore[misc]
+@nox.parametrize("pre", [False, True])
+def pytest_coverage(session: Session, pre: bool) -> None:
+    """Run pytest coverage across different python versions."""
+    pkg_install = [".[all]", "-r", "requirements/test.txt"]
+
+    if pre:
+        pkg_install.append("--pre")
+
+    session.install(*pkg_install)
+
+    session.run("pytest", "tests", "--cov=sksmithy", "--cov=tests", "--cov-fail-under=90", "--numprocesses=auto")