Add a git plugin, as a separate go package to support the common, main porcelain (see: `git --help --all`) git commands that can be run a list of folders, e.g. excluding cherry-pick as it is unlikely to be applicable across multiple folders due to the use of repo specific hashes. - Decorated with folder at end: `clone` - Decorated with `-C folder`: `add`, `branch`, `checkout`, `clean`, `commit`, `fetch`, `gc`, `grep`, `init`, `merge`, `pull`, `push`, `rebase`, `reset`, `restore`, `rm`, `stash`, `switch`, `tag`