feat: implement BrandSeeder and CategorySeeder and register them in DatabaseSeeder

database/seeders/DatabaseSeeder.php

@@ -22,6 +22,10 @@ class DatabaseSeeder extends Seeder
             'email' => 'test@example.com',
         ]);
 
-        $this->call(TenantSeeder::class);
+        $this->call([
+            TenantSeeder::class,
+            CategorySeeder::class,
+            BrandSeeder::class,
+        ]);
     }
 }