refactor: tweak isort

Only ignore parts of setup.py. This has two advantages: 1) If isort is applied to the file directly, e.g., by an eager IDE, it still doesn't sort the setuptools imports as needed. 2) The rest of the imports is sorted.

Also remove the configured ignore for docs/conf.py which seems to be fine.

pyproject.toml

@@ -21,9 +21,6 @@ skip_glob = [
     "**/*_pb2.pyi",
 ]
 skip = [
-    "setup.py", # setuptools needs to be loaded before distutils.
-                # Instruct isort not to go there. There be dragons.
-    "docs/conf.py",
     ".eggs",
     ".git",
     ".hg",

setup.py

@@ -4,10 +4,12 @@
 # since the former packages its own version of the latter.
 #
 # See https://setuptools.readthedocs.io/en/latest/deprecated/distutils-legacy.html
+# isort: off
 from setuptools import Command, setup
 from setuptools.command.build_py import build_py
 from setuptools.command.develop import develop
 
+# isort: on
 import logging
 import os
 import re