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

database/migrations/2026_08_04_000300_create_staff_category_assignments.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('category_scanners', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->cascadeOnUpdate()->cascadeOnDelete();
+            $table->foreignId('categoria_id')->constrained('categorias')->cascadeOnUpdate()->cascadeOnDelete();
+            $table->timestamps();
+
+            $table->unique(['user_id', 'categoria_id']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('category_scanners');
+    }
+};