Feature Request: Encryption

### Feature Request / Improvement

Apache Iceberg supports table encryption (https://iceberg.apache.org/docs/nightly/encryption/), and engines like Spark are capable now of writing and reading tables that adhere to Iceberg's encryption model.

This feature tracks PyIceberg supporting this. The eventual goal here would be (1) PyIceberg being able to read tables written by other engines according to Iceberg's encryption model, and (2) PyIceberg being able to write tables according to the encryption model, to be read by other engines. There's also the dimension of catalog support - on the Java side, Hive encryption is implemented and [REST encryption](https://github.com/apache/iceberg/pull/13225) will hopefully be soon.

Start with the Apache Iceberg encryption documentation and compare its model with the Spark interoperability described here, then review the linked Hive and REST catalog encryption references. Done would mean PyIceberg can read and write tables following the encryption model and address the catalog-support dimension.

Written by the indexing model from the issue text.