Expose all user settings in a single JSON-like format

Problem to solve

Finding settings in GitLab can be difficult. Even if you know the exact name of the setting you'd like to change, it can be difficult to remember which section contains that setting.

Proposal

Expose all GitLab project settings in a single page of structured content, similar to what you'd find in VS Code.

If we do this as part of the component-ization of Settings, this could be a single, large JSON file that is edited locally or in the Web IDE.