Add support for VarcharArray(true)

[lscheilling]

Describe your feature request

If you have a postgres table with a type varchar[](...), connectorx will fail for pandas and arrow return types with error:
RuntimeError: No conversion rule from VarcharArray(true) to connectorx::destinations::arrow::typesystem::ArrowTypeSystem.
RuntimeError: No conversion rule from VarcharArray(true) to connectorx::pandas::typesystem::PandasTypeSystem.

It seems to work for polars, polars2 and arrow2, have not tested the others, it would be nice to get this working for all return types.