Add JSON Dereference block

[gsambrotta]

Task
Create a new block which should take accept a JSON Schema document URL as input, and output a JSON Schema document as a string, or a JSON Schema object.

This would use dereferencing, a technique for merging referenced data from definitions that are stored in path addresses, into a merged schema.

How does JSON Schema Dereferencing work?

JSON Schema document dereferencing returns a merged JSON Schema document by following the reference location (from the same document, or an external URL) and replacing the $ref with the resolved content of the definition directly in the schema.

1. Input: Take JSON Schema URL string (content must point to a valid JSON schema)

2. Output: string or JSON Object

Example of using a JSON Schema Dereferencing library on a JSON Schema we tried to use:
https://github.com/kendraio/kendraio-gists/blob/main/schema_merge_tool.ts