Any plan to support JSON or JSONB?

### Is your feature request related to a problem or challenge?

Datafusion does not support JSON/JSONB datatype. Is there a plan to support it in the future?

### Describe the solution you'd like

support JSON/JSONB data

### Describe alternatives you've considered

Treat string/binary data as json/jsonb in json functions or json operators.

### Additional context

json functions in postgres: [functions-json](https://www.postgresql.org/docs/current/functions-json.html)

Start by reviewing DataFusion's existing datatype and function support, then compare the requested behavior with the linked PostgreSQL JSON functions reference. Done means defining and implementing agreed JSON/JSONB datatype and function or operator support, with the issue's scope resolved first.

Written by the indexing model from the issue text.