ci: Add check for formatting `default.json` (#30034)

This PR adds a check in CI to ensure that `assets/settings/default.json`
is formatted consistently.

Release Notes:

- N/A
5002156e32Marshall Bowers committed on 5/6/2025, 6:55:26 PM· committed by GitHubparentbd11bb5
3 files changedLine totals unavailable