fix: fall back to root on an unrecognized URL path kind

[eeshsaxena]

parse_remote_repo crashes on valid GitHub URLs whose path kind is not tree/blob/issues/pull:

from gitingest import ingest
ingest("https://github.com/user/repo/releases/tag/v1.0")
# ValueError: 'releases' is not a valid PathKind

The line kind = PathKind(path_parts.pop(0)) raises ValueError for any unrecognized segment, and ingest_async calls parse_remote_repo without catching it, so the whole ingest fails. Common URLs a user might paste hit this: /releases/..., /wiki, /actions, /commits/main, /security, etc.

It is also inconsistent: the known-but-unsupported kinds (issues, pull) already fall back to the repository root with a warning, but an unknown kind crashes instead.

This catches the ValueError and falls back to root the same way, so those URLs ingest the repository root instead of erroring. Added a regression test; the full query_parser suite passes (40 tests).

[eeshsaxena]

Hi! Gentle nudge on this one whenever you have some bandwidth. It's a small, self-contained fix (fix: fall back to root on an unrecognized URL path kind), and it's currently mergeable with no conflicts. No urgency at all, and I'm happy to make any changes you'd like. Thanks for maintaining gitingest!