Add support for JSONPath functions

*Support for JSONPath functions*

Datafusion to add JSONPath functions similar to PostgreSQL [JSON functions](https://www.postgresql.org/docs/current/functions-json.html)

Specially if we get support for:

* jsonb_path_query
* jsonb_path_query_array
* jsonb_path_query_first

This solves lot of issues with nested lists.

The issue names no implementation files or tests. Start by locating DataFusion's existing JSON-function entry points and compare the three requested functions with PostgreSQL's linked JSON functions; done means those functions are supported and covered by tests.

Written by the indexing model from the issue text.