CSV import supports language-specific columns and management of empty values

It's sufficient to include only the desired columns in the CSV file. If a value is missing, it can be left empty, which will result in the information being removed from the system.

Additionally, the CSV now supports multiple languages:

• Local columns utilize a language code, such as products_name[fi], products_name[sv], products_name[en].

• Language columns can be added or removed as needed.

• Import works in the Products section of the Admin Panel.