Add support for Apache Parquet

[jasonwalsh]

Currently, aptos supports converting JSON Schema documents into the Apache Avro data-interchange format.

A proposed class in the visitor module (e.g ParquetSchemaVisitor) should yield the converted Parquet document.

[lvde21]

Hello. I am looking for guidance on the approach and implementation of this issue. I have submitted a draft PR. This will be my first contribution. Thank you.