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

app/Domains/Catalog/Models/Category.php

@@ -2,11 +2,13 @@
 
 namespace App\Domains\Catalog\Models;
 
+use App\Domains\Auth\Models\User;
 use App\Domains\Tenant\Models\Tenant;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
 #[Fillable([
@@ -64,4 +66,15 @@ class Category extends Model
     {
         return $this->hasMany(CatalogItem::class);
     }
+
+    /** @return BelongsToMany<User, $this> */
+    public function scanners(): BelongsToMany
+    {
+        return $this->belongsToMany(
+            User::class,
+            'category_scanners',
+            'categoria_id',
+            'user_id',
+        )->withTimestamps();
+    }
 }