ST_Read?

The README says SedonaDB supports other file formats than GeoParquet.

> 📁 Format Flexibility: Supports legacy and modern file formats including GeoParquet, Shapefile, GeoJSON

I'm not sure whether this "support" means that SedonaDB itself can read these files, but I think it would be handy to load data within SQL if the data is small (e.g. we want to join a GeoJSON containing administrative boundaries). Also, probably the CLI needs this.

I know this violates the interoperability with SedonaSpark, so I'm not sure if you like the idea. Are there any plan to provide such a function?

Start with the README's claim about GeoParquet, Shapefile, and GeoJSON support, then review the existing SQL and CLI input paths. Determine whether small-file loading should be supported by SedonaDB, the CLI, or both, while considering the stated SedonaSpark interoperability concern. Done requires an agreed scope and plan rather than an implementation target currently specified by the issue.

Written by the indexing model from the issue text.