Quick start
Run your first medium command.
Once medium is on your PATH:
medium --help # see the command tree
medium version # build info
This is a fresh scaffold, so the command tree is just version for now. Add
your first real command in cli/, build on the medium library package,
and document it here.
A good first command usually fetches one thing and prints it as JSON, so the
output pipes straight into jq and the rest of your tools.