Apply ruff/isort rules (I) (#1716)

Author: DimitriPapadopoulos

Diff for: fsspec/implementations/reference.py

@@ -5,8 +5,8 @@
 import logging
 import math
 import os
-from itertools import chain
 from functools import lru_cache
+from itertools import chain
 from typing import TYPE_CHECKING, Literal
 
 import fsspec.core

Diff for: pyproject.toml

@@ -163,6 +163,7 @@ select = [
     "E9",
     "F",
     "FURB",
+    "I",
     "LOG",
     "PERF",
     "PLC",