git integration: hide when not listing files in a Git repository

[Jackenmen]

Right now, enabling git column causes it to show in all directory listings, regardless of whether we're listing files inside a Git repository or not. In comparison, exa only shows the Git column when running it inside a directory that is part of a Git repository (i.e. inside ~/git-repo and ~/git-repo/subdir but not inside ~). I think that exa is better in this regard - it minimizes the clutter that isn't relevant when not run in a repository.

One potential edge case is that it still has to work correctly when run with --tree option where only part of a tree might be part of a Git repository.

[Jackenmen]

I actually realized that exa just doesn't show the Git integration when run with --tree so I suppose that's also an option you may want to consider to make this simpler to implement.

[Jackenmen]

lsd doesn't handle currently show proper status on subdirectories that are git repositories anyway.

[zwpaper]

sound reasonable, we can add this feature later, can you please create an issue to track it?