feat(forms): implement MerchandiseFormController, MerchandiseFormService, and MerchandiseFormResource for managing merchandise options

app/Domains/Forms/Resources/MerchandiseFormResource.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Domains\Forms\Resources;
+
+use App\Domains\Catalog\Models\AttributeOption;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+use Illuminate\Support\Collection;
+
+class MerchandiseFormResource extends JsonResource
+{
+    /** @return array<string, mixed> */
+    public function toArray(Request $request): array
+    {
+        return [
+            'colors' => $this->options($this->resource['colors']),
+            'sizes' => $this->options($this->resource['sizes']),
+        ];
+    }
+
+    /**
+     * @param  Collection<int, AttributeOption>  $options
+     * @return Collection<int, array{value: string, label: string}>
+     */
+    private function options(Collection $options): Collection
+    {
+        return $options->map(fn (AttributeOption $option): array => [
+            'value' => $option->value,
+            'label' => $option->label,
+        ])->values();
+    }
+}