Add Git hooks to automatically run project-manager switch

[sellout]

Generated files are easy to get out of sync and committed generated files can result in conflicts when rebasing, etc.

Consequently, it would be useful to have some Project Manager options that can create Git hooks that automatically run project-manager switch in some situations.

E.g.,

• the post-checkout hook can ensure that the generated files are in sync when you switch branches¹,
• pre-push can check that generated files are up-to-date, and
• regenerating the files on each step of an interactive rebase can quickly clear up conflicts after some earlier change.

These should be optional, as regenerating files can take some time, and it may not be important for a repo to, say, ensure that every commit has up-to-date files, so long as the PR itself does.

Footnotes

1. I also have post-checkout set for my user, so that when I clone a new Project Manager-using repo, files are generated immediately. ↩