I need help with a Shopware Backend Module (Shopware 5.x) . I like to associate a 1-to-Many list of categories to a customer. The customer details views would need an extra tab. The Tab should use the component "shopware-form-field-category-grid" ([url removed, login to view]), which shows a grid with categories.
The ExtJS side should include whatever is needed here. The PHP backend will be provided. This project is only focusing on the JavsScript side.