CLI: Fix auth token validation for older config files

[bcotrim]

Related issues

• Fixes https://linear.app/a8c/issue/STU-836

Proposed Changes

• Make authToken.id optional in the CLI schema to support older config files
• Add validation in getAuthToken() to ensure id exists when the token is actually used

Testing Instructions

1. Edit your appdata-v1.json file (located at ~/Library/Application Support/Studio/appdata-v1.json on macOS)
2. Remove the id field from the authToken object
3. Run npm run cli:build
4. Run node ./dist/cli/main.js in terminal - should show help without errors
5. Try to use a preview command (e.g., node ./dist/cli/main.js preview create) - should get a clear "Authentication required" message
6. Re-authenticate via the Studio app
7. Preview commands should now work correctly

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[ivan-ottinger]

The changes look good and work as expected. 👌🏼🙂

4. Run node ./dist/cli/main.js in terminal - should show help without errors

---

Try to use a preview command (e.g., node ./dist/cli/main.js preview create) - should get a clear "Authentication required" message

I was just running this outside of the folder with WordPress site so I temporarily commented out these two checks:

[nightnei]

LGTM and works well 👍
@ivan-ottinger JIC I tested inside wordpress folder and it works well:
node ~/<path_to_studio>/studio/dist/cli/main.js preview create