feat: Implement staff management features; add controller, service, resource, routes, and tests for staff and category assignments

app/Domains/Forms/Resources/StaffFormResource.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Domains\Forms\Resources;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class StaffFormResource extends JsonResource
+{
+    /** @return array<string, mixed> */
+    public function toArray(Request $request): array
+    {
+        return [
+            'categories' => $this->resource['categories']->map(fn ($category) => [
+                'id' => $category->id,
+                'nombre' => $category->nombre,
+            ])->values(),
+        ];
+    }
+}