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/es-MX.json

@@ -0,0 +1,10 @@
+{
+  "dateTime": "%x, %X",
+  "date": "%d/%m/%Y",
+  "time": "%-I:%M:%S %p",
+  "periods": ["AM", "PM"],
+  "days": ["domingo", "lunes", "martes", "miércoles", "jueves", "viernes", "sábado"],
+  "shortDays": ["dom", "lun", "mar", "mié", "jue", "vie", "sáb"],
+  "months": ["enero", "febrero", "marzo", "abril", "mayo", "junio", "julio", "agosto", "septiembre", "octubre", "noviembre", "diciembre"],
+  "shortMonths": ["ene", "feb", "mar", "abr", "may", "jun", "jul", "ago", "sep", "oct", "nov", "dic"]
+}