Format project

[JetVolcano]

• Used ruff format . to format the python files.
• Formated tests/grammars/*.pest files to improve readability.

[jg-rp]

Hi @JetVolcano,

Those three Python files are automatically generated every time we run pytest (they all say "This file was generated by Python Pest..." at the top). So formatting them with ruff is not going to last long.

Rather than trying to guess what formatting rules a user might want, the current policy is to generate whatever comes naturally from pest.condegen.Builder and assume the user will run the output through their own formatter (I don't want to force a Ruff dependency on everyone).

Otherwise those .pest files in tests/grammars/ are deliberately copied verbatim from https://github.com/pest-parser/pest. I consider the formatting of those files part of the test.