feat: add fsspec as required dependency (#1021)

* fsspec requirements

* simplify fsspec import

* use loop property

* correctly create schemes list

Author: lobis

src/uproot/_util.py

@@ -293,7 +293,6 @@ def regularize_path(path):
 _remote_schemes = ["root", "s3", "http", "https"]
 _schemes = list({*_remote_schemes, *fsspec.available_protocols()})
 
-
 def file_object_path_split(urlpath: str) -> tuple[str, str | None]:
     """
     Split a path with a colon into a file path and an object-in-file path.