Make pre-commit hooks available to open source projects

[danyeaw]

Checklist

• [X] This is a new feature, not a refactoring suggestion
• [X] I have checked for this feature in the Sourcery documentation
• [X] I have checked there are no open requests referencing the same feature

Description

It would be really nice to include the sourcery pre-commit hooks in open source projects so that we get fewer refactoring PRs and don't require all contributors to install an IDE plugin. Right now, every contributor would have to make at least a sourcery free account.

[reka]

Hi @danyeaw ,

Thanks a lot, that's a great idea. :+1: We're looking into options to make this happen.