Add support for chunked rows mode?

[vog]

Are there any plans to support PostgreSQL's chunked rows mode, i.e. to add PGRES_TUPLES_CHUNK and PQsetChunkedRowsMode? See also:

• https://www.postgresql.org/docs/17/libpq-single-row-mode.html

[mmottl]

I'm only maintaining the bindings these days, please feel free to submit a PR.