This is a fairly substantial change, which adds a new configuration file
to the user's `$RAD_HOME` that includes node configuration, including
the alias, and also makes node aliases required.
When running `rad auth`, the user is now prompted for an alias, which
defaults to `$USER`.
When running `rad self`, the alias is now shown.
If the user runs radicle without a config file, the defaults are loaded,
and `$USER` is used as the alias.
'git pull' in workflow/6-pulling-contributor causes a message to be
emitted for some git versions. It asks to configure 'git pull's default
action.
Use '--ff' as a workaround as a git config file is unsupported, and no
environment variable exists for this configuration.
Alexis Sellier
Slack Coder