`parse_options()` has explicit branches for when flake8 provides `comma_separated_list` values as `list[str]`, but the tests currently only cover the string/None paths. Add test cases passing `project_packages=[...]` and `inh002_allowed_dunders=[...]` to ensure the list-handling behavior stays correct.

[steven-cutting]

parse_options() has explicit branches for when flake8 provides comma_separated_list values as list[str], but the tests currently only cover the string/None paths. Add test cases passing project_packages=[...] and inh002_allowed_dunders=[...] to ensure the list-handling behavior stays correct.

Originally posted by @copilot-pull-request-reviewer in #34 (comment)