Consider allowing globs for `src.root` or `environment.extra-paths`

Mono repos with multiple packages may need multiple src roots (see https://github.com/astral-sh/ruff/issues/16712) 

We may want to change `src.root` to a list and allow globs and OR support globs in `extra-paths`.