Arrow Flight SQL support

[fanyang01]

For queries that produce a large number of result rows, fetching result through the MySQL/Postgres protocol can be slow. Arrow Flight SQL is a Arrow-based, columnar-oriented protocol, enabling faster data transfer.

https://arrow.apache.org/docs/format/FlightSql.html

Official SQLite-backed server implementation:

https://github.com/apache/arrow-go/tree/main/arrow/flight/flightsql/example

Another C++ example project:

https://github.com/voltrondata/sqlflite