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/embla-carousel/cjs/components/SlidesToScroll.d.ts

@@ -0,0 +1,7 @@
+import { AxisType } from './Axis';
+import { NodeRectType } from './NodeRects';
+export type SlidesToScrollOptionType = 'auto' | number;
+export type SlidesToScrollType = {
+    groupSlides: <Type>(array: Type[]) => Type[][];
+};
+export declare function SlidesToScroll(axis: AxisType, viewSize: number, slidesToScroll: SlidesToScrollOptionType, loop: boolean, containerRect: NodeRectType, slideRects: NodeRectType[], startGap: number, endGap: number, pixelTolerance: number): SlidesToScrollType;