Add .pre-commit-config.yaml
Add .pre-commit-config.yaml

See https://pre-commit.com/ for documentation on how to use
this file.

SQLAlchemy and related projects make use of Black and zimports
for code formatting, this hook allows for automated pre-commit
runs.

Change-Id: I4bbb49747e9f7fb52251dc61ecda98361cd036fd

monetate/sqlalchemy,graingert/sqlalchemy,j5int/sqlalchemy,sqlalchemy/sqlalchemy,wujuguang/sqlalchemy,j5int/sqlalchemy,graingert/sqlalchemy,wujuguang/sqlalchemy,monetate/sqlalchemy,zzzeek/sqlalchemy