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/SectionsSeeder.php

@@ -26,7 +26,7 @@ class SectionsSeeder extends Seeder
                     'sort_order' => $data->priority,
                     'created_at' => $data->created_at,
                     'updated_at' => $data->updated_at,
-                ]);                
+                ]);
             }
 
             DB::statement("