Add a JSON/object type for semi structured data

[Samrose-Ahmed]

Overview

Currently, semi structured data must be stringified and defined as a string type. Subsequently, it is always treated as a string type (e.g. in detections).

Goal

Add a JSON or object type that represents JSON/object data. This can be auto-coerced to physical type string for the Iceberg schema. We can use this information to provide additional features for detections and searching.

Notes