Geo types example

### Is your feature request related to a problem or challenge?

Hi,
I was wondering about the geospatial data storage capabilities for this.
It looks like there's specifications such as https://www.geoiceberg.org/ in development and articles such as [this](https://wherobots.com/blog/benefits-of-apache-iceberg-for-geospatial-data-analysis/)
I think that developers in the geospatial Rust community would love to integrate this.
Could it be possible to include an example to get started ?
Please advise whether this is actually helpful or not really necessary.

### Describe the solution you'd like

An example rest server that holds onto and serves [Geo types](https://docs.rs/geo-types/latest/geo_types/). Ingest could include Parquet, GeoJSON etc .

### Willingness to contribute

I would be willing to contribute to this feature with guidance from the Iceberg Rust community

Start by reviewing the proposed REST server example and the geo-types, Parquet, and GeoJSON requirements in the issue. Clarify the supported storage and ingestion scope with the Iceberg Rust community; done means a documented example that serves Geo types and demonstrates the agreed ingestion paths.

Written by the indexing model from the issue text.