It can take some time to unmarshal large mission control data sets such
that the macaroon can expire during that phase. We postpone the
connection establishment to give the user more time to answer the
prompt.
We want to export some of our CLI code to re-use in other projects. But
in Golang you cannot import code from a `main` package.
So we need to move the actual code into its own package and only have
the `func main()` in the `main` package.
