Adds improved matching for globs

[scuml]

Improves the matching mechanism for globs addressed in PR #92

This problem is solved with the new full_match method available in python 3.13. https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.full_match

To make the problem less severe in previous python versions, I made an improved version of fnmatch() that handles the most common */** pattern. (Using onlyfnmatch() does not select files on the top level making things feel very broken.) This way we can get the benefit of improved matching in older versions, without having to rely on an additional globber dependency.

Fixes:
#69
#91

[adamchainz]

Thank you for starting this one @scuml . I have just merged a version of it in #166, with you as co-author.

I opted to avoid the fnmatch wrapper, since I wasn't confident it would work in all situations, and it would give a third behaviour that could be hard to debug when upgrading django-watchfiles. Therefore the fix is restricted to Python 3.13+.

I did try to backport everything necessary to make Path.full_match() work, but after copying the extensive functional changes in Python 3.13 for fnmatch, glob, and pathlib, it produced an incorrect result, probably due to uncopied changes to other functions.

[scuml]

That's the right call. Behavior too unpredictable otherwise.
You and your incredible work came up in a group conversation at DjangoCon Chicago yesterday. Your contributions are appreciated by so many here.

[adamchainz]

Oh, thank you!