Sanity Studio v5.30.0: Fixes auth store SSO loop and `@sanity/cli` missing import

This release fixes an authentication loop that could trap users on the login screen and missing getWorkspace in @sanity/cli.

If you experience a login loop and are unable to upgrade to this version, clear your browser's site data for the Studio (or run localStorage.removeItem('__studio_auth_token_<projectId>') in the devtools console) and reload.

🐛 Notable bugfixes and improvements

• Fixes an authentication loop that could in certain cases trap users on the login screen.
• Adds missing changeset for @sanity/cli-core.
• Fixes an issue causing “getWorkspace is not a function” when running sanity schema extract.