Build a simple, instructor-friendly quiz builder for our online learning platform. In one guided flow, teachers should add basic quiz details (title, subject, time limit), create questions (multiple choice, true/false, fill-in-the-blank), drag to reorder them, and preview everything before publishing. This should be delivered as a standalone Angular SPA using the Clarity design system, with the steps handled via routed wizard pages. Please keep state unified and reactive with RxJS services so changes in one step instantly reflect elsewhere.