DOC: describe UPath/s3fs behavior with `is_dir()`#503

Merged

ap-- merged 2 commits intofsspec:mainfrom

Dec 20, 2025

Commits on Dec 14, 2025

scaffold docs for `S3Path.is_dir()` returns `False` instead of raising error when no credentials are provided
lagamura
committed

Commits on Dec 19, 2025

docs: align style with other sections
ap--
committed