Parquet Support

[utdemir]

Parquet is a commonly used data format, but sadly Haskell ecosystem is lacking a mature library.

If we implement a library to encode/decode Parquet files, we can both use it in this library and it will be a nice addition to the Haskell ecosystem.

There is one old incomplete attempt implementing a Parquet reader in Haskell here: https://github.com/laurencer/parquet-haskell

[utdemir]

PR #26 is working on this.