feat: Introduce source type for featured groups; add category association and implement FeaturedGroupService for item sourcing

app/Domains/Catalog/Enums/FeaturedGroupSource.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Domains\Catalog\Enums;
+
+enum FeaturedGroupSource: string
+{
+    case Manual = 'manual';
+    case Category = 'category';
+    case All = 'all';
+
+    /**
+     * @return list<string>
+     */
+    public static function values(): array
+    {
+        return array_column(self::cases(), 'value');
+    }
+}