Feature: #106092 - Associative array keys for TCA valuePicker items

See forge#106092

Description

It is now possible to define associative array keys for the items configuration of TCA configuration valuePicker. The new keys are called: label and value.

This follows the change done already to the items configuratio of the TCA types select, radio and check. See forge#99739

Impact

It is now much easier and clearer to define the TCA items configuration with associative array keys. The struggle to remember which option is first, label or value, is now over. In addition, optional keys like icon and group can be omitted, for example, when one desires to set the description option.