Adds package manager, unit-testing and exposed look-around limitation

[aekasitt]

I took the liberty to extend the project with uv as package manager because I wanted to run tests on the project using pytest as a development dependency.

I did so, and created a uv.lock file as well as tests directory where the tests are. The unittests are AI-generated and it allowed for me to find the following error, which breaks compatibility between python's re and this project.

error: look-around, including look-ahead and look-behind, is not supported

 tests/search.py:149: in test_regex_compile_and_search
    pattern: module.Pattern = module.compile(arguments["pattern"])  # type: ignore
E   ValueError: regex parse error:
E       ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$
E        ^^^
E   error: look-around, including look-ahead and look-behind, is not supported
__________________________________________________________________________ test_regex_compile_and_search[arguments26-flpc] ___________________________________________________________________________
tests/search.py:149: in test_regex_compile_and_search
    pattern: module.Pattern = module.compile(arguments["pattern"])  # type: ignore
E   ValueError: regex parse error:
E       ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$
E        ^^^
E   error: look-around, including look-ahead and look-behind, is not supported

Let me know if this is something you would like to pursue further, would love to help.

[itsmeadarsh2008]

error: look-around, including look-ahead and look-behind, is not supported by the regex crate
Also, thanks for taking some time to write tests for it. I'll take a look back if this becomes necessary
rust-lang/regex#841 (comment)

[aekasitt]

Thank you for your great work. Whichever way you decide, I think the base work was very easy to navigate and extend.