npm root -g and npm bin -g should be sped up

[ORESoftware]

Even on the latest npm versions, npm root -g and npm bin -g are really slow, surely because they load all sorts of files on program load. I would like to use them as part of shell scripts but they are really slow and expensive commands.

Solution - create an npm entry point that doesn't load everything, and for certain commands don't load all the code.