feat: redesign Exams List page to show submitted custom exams

- Added Custom Exams tab showing all exams from Generation page
- Displays title, module badges, duration, and status
- Added Create Exam button
- Kept Exam Sessions tab for institutional sessions
- Search filters across exams

Made-with: Cursor

node_modules/fast-glob/out/providers/async.d.ts

@@ -0,0 +1,9 @@
+import { Task } from '../managers/tasks';
+import { Entry, EntryItem, ReaderOptions } from '../types';
+import ReaderAsync from '../readers/async';
+import Provider from './provider';
+export default class ProviderAsync extends Provider<Promise<EntryItem[]>> {
+    protected _reader: ReaderAsync;
+    read(task: Task): Promise<EntryItem[]>;
+    api(root: string, task: Task, options: ReaderOptions): Promise<Entry[]>;
+}