git worktree add verbosity

Hello,

We are using git for automation in our build2 project.

What's quite inconvenient is that the 'git worktree add' command prints 
some output by default and there is no way to suppress it, as it 
normally can be achieved with the --quiet option for the most of git 
commands.

Could you add support for the --quiet option for the worktree command?

Best regards,
Karen