List Documents

List the Documents in the user's account, newest first: each document's history, with its document_id, name, version_count and latest_version. Use it only for a document the user has no file of and that no earlier result names ("the Mission draft", "my NDA"); then GET /v1/documents/{document_id} lists its versions. A name matching one of the user's files (in their folder, attached or linked) means that file: upload it with POST /v1/files and work on it as given, without looking for the name here first, unless the user asks for the stored versions. A page holds up to limit Documents; pass next_cursor to read the next one.