The improved NervesHub CLI

This is pretty nice. For some reason previously when I tried to install it using mix archives, the command never worked without specifying the full path to the escript.

As someone who just dived into this a few months ago, I expected that the CLI was doing only local stuff. It was pretty confusing at first to find out that it’s a mixed bag of both local commands and the ones that require an active connection to a instance of nerveshub_web. The way you set local state (like organization selection) in it it’s also a bit confusing and I would be in favor of explicit long commands honestly.