feat: implement FeaturedVariant and CatalogController for managing featured variants and catalog display

app/Domains/Product/Requests/UpdateFeaturedVariantRequest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Domains\Product\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateFeaturedVariantRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'order' => ['sometimes', 'integer'],
+        ];
+    }
+}