Workingset updated version

[ZinnurovArtur]

Current work to the workingset that has been done:

• Button to the codelist if the user wants to add an attribute
• Modal interface
• Table interface with attributes
• Cells with inputs
• Placeholder for cells inputs
• Deletion of attributes
• Appending data to the concept_information
• Validation of each cell from the type value(frontend)
• Validation of each cell from the type value(backend)
• Show data in the API - creating API endpoint
• Show data in the detail page
• Functional tests
• Documentation

[ZinnurovArtur]

I will add the functional tests as separate tasks