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/d3-time-format/locale/fr-CA.json

@@ -0,0 +1,10 @@
+{
+  "dateTime": "%a %e %b %Y %X",
+  "date": "%Y-%m-%d",
+  "time": "%H:%M:%S",
+  "periods": ["", ""],
+  "days": ["dimanche", "lundi", "mardi", "mercredi", "jeudi", "vendredi", "samedi"],
+  "shortDays": ["dim", "lun", "mar", "mer", "jeu", "ven", "sam"],
+  "months": ["janvier", "février", "mars", "avril", "mai", "juin", "juillet", "août", "septembre", "octobre", "novembre", "décembre"],
+  "shortMonths": ["jan", "fév", "mar", "avr", "mai", "jui", "jul", "aoû", "sep", "oct", "nov", "déc"]
+}