Links the launcher shipped in the package (inst/bin/rmorie) into a
directory on your PATH so that rmorie login, rmorie ask ...
and the other verbs of morie_cli work from any shell. On
Windows a rmorie.cmd wrapper is written instead of a symlink.
Usage
install_cli(
dir = file.path(path.expand("~"), ".local", "bin"),
name = "rmorie"
)