Refactor seeders for improved clarity and functionality

- Reorganized imports in DatabaseSeeder for better structure.
- Enabled ProductCategoryRelationshipsSeeder and ProductBarcodesSeeder in DatabaseSeeder.
- Updated ProductPropertyValuesSeeder to enhance property value handling and added a new method for filling product property values.
- Removed unused imports from ProductBarcodesSeeder, ProductCategoryRelationshipsSeeder, and ProductPropertiesSeeder.
- Ensured consistent formatting by adding missing newlines at the end of files.

database/seeders/new/ProductBarcodesSeeder.php

@@ -4,7 +4,6 @@ namespace Database\Seeders\New;
 
 use Illuminate\Database\Seeder;
 use Illuminate\Support\Facades\DB;
-use Illuminate\Support\Facades\File;
 use JsonMachine\Items;
 use JsonMachine\JsonDecoder\ExtJsonDecoder;
 
@@ -28,4 +27,4 @@ class ProductBarcodesSeeder extends Seeder
             }
         });
     }
-}
+}