Install the Yesod CLI tool within a Yesod scaffolded site

Helper tool for Yesod, a Haskell-based web framework.
All Yesod commands are invoked through the `stack` project manager.
More information: <https://github.com/yesodweb/yesod>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

stack build yesod-bin cabal-install --install-ghc

click the source code to copy install yesod on any operating system with command-not-found.com