Add .pre-commit-hooks.yaml to allow be run as a pre-commit hook

[XuehaiPan]

As per the title, users can use addlicense as a pre-commit hook:

# .pre-commit-config.yaml

repos:
  - repo: https://github.com/XuehaiPan/addlicense
    rev: '0a8669'
    hooks:
      - id: addlicense
        args: [-check, -l, apache, -c, "Some Team. All Rights Reserved."]

[C-Loftus]

Think this can probably be merged right? Looks like everything is all set unless I am missing something

[mco-gh]

Thanks

[mco-gh]

Looks like you need an approving reviewer.
@willnorris ?