ResolveReferences recursively resolves all references in the provided documents, returning a map of all documents by their ID, and a set of IDs of any referenced documents that are missing.

ResolveReferencesStrict is a strict version of ResolveReferences, which will return ErrReferencedDocumentMissing if any referenced Document is missing.

Document is a Document from a Sanity dataset It must have a string `_id` field uniquely identifying the Document Any nested fields wishing to reference another Document must be a map with a `_ref` key, whose value matches the `_id` of the Document to reference Unmarshal directly into this type to use this package.