[py] Lint and format all python files (SeleniumHQ#15828)

* Adjust the linting/formatting (ruff) settings in so tox scans the entire ./py directory tree, not just specific directories

Author: cgoldberg

py/tox.ini

@@ -37,5 +37,5 @@ skip_install = true
 deps =
   ruff==0.11.12
 commands =
-  ruff check --fix --show-fixes --exit-non-zero-on-fix selenium/ test/ conftest.py
-  ruff format --exit-non-zero-on-format selenium/ test/ conftest.py
+  ruff check --fix --show-fixes --exit-non-zero-on-fix .
+  ruff format --exit-non-zero-on-format .