Unstructured data support in Apache Polaris

### Describe the solution you'd like

Polaris has become a cornerstone for managing structured data across diverse processing engines, ensuring high performance and reliability. To further enhance its capabilities, we propose extending Polaris to support unstructured data. This will enable it to handle a broader range of data types efficiently, meeting the growing demands of AI/ML and other data-intensive applications.

You can find the proposal here: [Proposal: Unstructured Data Support in Polaris](https://docs.google.com/document/d/1ofljkrtiXRWc-v6hfkg_laKlYltepTPX7zsg44Tb-BY/edit?usp=sharing)