Pipe stdin when git operations ask for passphrase for ssh keys

[joyeecheung]

I've been doing ssh-add -K /path/to/key for this but it would be nice if git-node can just pipe to stdin (or at least display something more informative about this)

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.