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/date-fns/locale/ar-DZ.d.ts

@@ -0,0 +1,10 @@
+import type { Locale } from "./types.js";
+/**
+ * @category Locales
+ * @summary Arabic locale (Algerian Arabic).
+ * @language Algerian Arabic
+ * @iso-639-2 ara
+ * @author Badreddine Boumaza [@badre429](https://github.com/badre429)
+ * @author Ahmed ElShahat [@elshahat](https://github.com/elshahat)
+ */
+export declare const arDZ: Locale;