Implement flash messages, refactor candidate retrieval, and enhance quiz functionality

src/Enum/FlashType.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum FlashType: string
+{
+    case Primary = 'primary';
+    case Secondary = 'secondary';
+    case Success = 'success';
+    case Danger = 'danger';
+    case Warning = 'warning';
+    case Info = 'info';
+    case Ligt = 'light';
+    case Dark = 'dark';
+}