Json function mapping for snowflake

[henneberger]

Map our json functions to snowflake json functions.

https://docs.snowflake.com/en/sql-reference/functions-semistructured

[henneberger]

This is partially completed but not live. The json functions don't map cleanly and more comprehensive work needs to be done to support this. https://github.com/DataSQRL/sqrl/tree/0ccc9ba5cb998e49e8f897261f31fac726bb94b8/sqrl-planner/src/main/java/com/datasqrl/functions/json/snowflake