add top level hffs

Author: lhoestq

src/huggingface_hub/__init__.py

@@ -296,6 +296,7 @@
         "HfFileSystemFile",
         "HfFileSystemResolvedPath",
         "HfFileSystemStreamFile",
+        "hffs",
     ],
     "hub_mixin": [
         "ModelHubMixin",
@@ -1312,6 +1313,7 @@ def __dir__():
         HfFileSystemFile,  # noqa: F401
         HfFileSystemResolvedPath,  # noqa: F401
         HfFileSystemStreamFile,  # noqa: F401
+        hffs,  # noqa: F401
     )
     from .hub_mixin import (
         ModelHubMixin,  # noqa: F401

src/huggingface_hub/hf_file_system.py

@@ -1255,3 +1255,5 @@ def make_instance(cls, args, kwargs, instance_state):
     for attr, state_value in instance_state.items():
         setattr(fs, attr, state_value)
     return fs
+
+hffs = HfFileSystem()