Support more arguments in FindFilesBase

[JakkuSakura]

This is an attempt to make FindFiles more useful.

~It has not been tested yet~

closes #1174

[JakkuSakura]

Just fixed linting. one notable change is fname mypy caught that name is defined in FactBase, thus we can't use name directly

[JakkuSakura]

I'm not sure how to express args: List[str] especially it may contain QuoteString

[JakkuSakura]

finally... I also managed to enhance the tests to support dict as argument.

[JakkuSakura]

Much appreciated! It's my first PR for pyinfra and the lining has cost me some time, but eventually figured out how to do it properly

[Fizzadar]

Much appreciated! It's my first PR for pyinfra and the lining has cost me some time, but eventually figured out how to do it properly

Would love any comments/ideas/etc on how to make the experience better when contributing 🙏