[FEATURE REQUEST]Support AI/ML Models

### Is your feature request related to a problem? Please describe.

No

### Describe the solution you'd like

Extend the support in a catalog from Data to AI/ML models. The Polaris catalog could facilitate
1. Storing metadata about models aiding in model discovery
2. Integration with MLFlow client
3. Model provenance
4. Mapping of Models to the data it operates on
5. Storing model performance metrics snapshots
6. Access control on models
7. Model and its data versioning
8. Custom properties associated with models
9. Integration with feature stores
10. Storage and access of policies associated with model usage
11. Integration with workflow engines

### Describe alternatives you've considered

Have briefly looked at unity catalog, would like to see Polaris supporting AI/ML models too

### Additional context

_No response_

No files, tests, or entry points are named. Start by asking maintainers which of the eleven requested capabilities is in scope and where catalog extensions belong; done should be a documented, agreed scope with acceptance criteria.

Written by the indexing model from the issue text.