ci/lint: add isort checks

TOOLS/macos-sdk-version.py

@@ -9,6 +9,7 @@ import sys
 from shutil import which
 from subprocess import check_output
 
+
 def find_macos_sdk():
     sdk = os.environ.get("MACOS_SDK", "")
     sdk_version = os.environ.get("MACOS_SDK_VERSION", "0.0")

TOOLS/macos-swift-lib-directory.py

@@ -8,6 +8,7 @@ import sys
 from shutil import which
 from subprocess import check_output
 
+
 def find_swift_lib():
     swift_lib_dir = os.environ.get("SWIFT_LIB_DYNAMIC", "")
     if swift_lib_dir:

pyproject.toml

@@ -5,6 +5,7 @@ line-length = 100
 select = [
     "F", # pyflakes
     "E", "W", # pycodestyle
+    "I", # pycodestyle
     "N", # pep8-naming
     "UP", # pyupgrade
     "A", # flake8-builtins