X.L.WorkspaceDir: Export Chdir
X.L.WorkspaceDir: Export Chdir

This makes it possible to change the workspace directory by sending a
message, which enables automation/scripting not possible with
`changeDir` which displays a prompt.

Example of such usage:
https://github.com/liskin/dotfiles/blob/6ea6c52aac4d39fa5a788372e005954715cb6d9a/.xmonad/xmonad.hs#L183-L189

xmonad/xmonad-contrib,xmonad/xmonad-contrib