Document an officially recommended .gitignore for direnv users?

[spenserblack]

Just started using this tool and I love it!

I think it's pretty evident that the .direnv folder, which can contain virtual environments and dependencies should be ignored. Even though it might be obvious, however, a documented recommended .gitignore can be helpful.

Context: I think it would be helpful for the github/gitignore repository to have an entry for direnv in their Global folder. To move that forward, it would be helpful to be able to point to official documentation as justification.