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.

Apache Iceberg の暗号化ドキュメントから始め、ここで説明されている Spark との相互運用性とそのモデルを比較し、その後、リンクされている Hive および REST カタログの暗号化リファレンスを確認してください。PyIceberg が暗号化モデルに従うテーブルを読み書きでき、カタログサポートの側面にも対応できれば完了です。

索引モデルが issue の本文から書いたものです。