Building docs fails if I don't have ruff globally installed

[dfalbel]

⚠️  API reference build failed with dynamic introspection.
   Retrying with static analysis (dynamic: false)...


❌ API reference build failed (static mode):
[Errno 2] No such file or directory: 'ruff'
dfalbel@Daniels-MacBook-Pro raghilda % ruff
zsh: command not found: ruff

[rich-iannone]

Ruff is now a dependency for the v0.1 release. (It'll likely be removed in the near future though.)