docs: Ask readers to install swh.model[cli] to fully use swh-identify
Otherwise, they will get an error asking them to install Click (or Dulwich if Click installed and they use -t snapshot)
Resolves T3226
Migrated from D5469 (view on Phabricator)
Otherwise, they will get an error asking them to install Click (or Dulwich if Click installed and they use -t snapshot)
Resolves T3226
Migrated from D5469 (view on Phabricator)