python: run isort, add shebangs on all files

tools/README-generator/make_readme.py

@@ -2,12 +2,13 @@
 
 import argparse
 import json
-import toml
 import os
 from pathlib import Path
 
+import toml
 from jinja2 import Environment, FileSystemLoader
 
+
 def value_for_lang(values, lang):
      if not isinstance(values, dict):
          return values