feat: allow list of files in exclude option

[mrexox]

Closes https://github.com/evilmartians/lefthook/issues/717

Add support for the file list in exclude option.

pre-commit:
  commands:
    lint:
      run: yarn lint {staged_files}
      exclude:
        - vendor/some-file.js
        - package.json

:zap: Summary

• [x] Allow using a list of files in the exclude option
• [x] Support regexp too
• [x] Update docs
• [x] Add integration tests

[mrexox]

I am going to release this PR tomorrow with a new lefthook version 1.7.3