add pre-commit config (#6341)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Akuli <akuviljanen17@gmail.com>

pyproject.toml

@@ -1,7 +1,7 @@
 [tool.black]
 line_length = 130
 target_version = ["py37"]
-exclude = ".*_pb2.pyi"
+force-exclude = ".*_pb2.pyi"
 skip_magic_trailing_comma = true
 
 [tool.isort]