Feature: #99226 - Introduce dbType json for TCA type user
See forge#99226
Attention
This TCA option is no longer available! It has been replaced by the dedicated json TCA type. Do not use this option in your installation, but use the new TCA type.
Description
To allow storage and usage of JSON data in TCA type user without needing to
decode the JSON in each user implementation manually, a dbType is introduced
for TCA type user.
Impact
When creating TCA type user fields with a database JSON field, the
dbType json can now be set. After setting the dbType, the form engine will
automatically provide the decoded JSON to the RecordProviders and the user
PHP implementation can then use the field value.