feat(zsh): add vcs-jump to path
feat(zsh): add vcs-jump to path

So that I can jump straight into merge conflict resolution in Vim from
the command-line; eg. a typical flow:

    git rebase master # boom!
    git st # inspect what went wrong
    vcs-jump merge # fix it

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent