adds Lzzt source datasets

[swhume]

Adds reverse-engineered LZZT source datasets created using CDASH in Dataset-JSON v1.0 and then converted to NDJSON v1.1. These are a first take at LZZT raw source datasets. The conversion is courtesy of Ali Dootson.

[chowsanthony]

If we are comparing to the list of XPT files, we are missing a few like relrec, se, suppae, etc. Should we add those too?

[swhume]

All the datasets that Ali reverse-engineered are part of the PR. For any additional datasets, we'll need to do the reverse engineering ourselves or find someone to do it. Here's the source folder:
https://github.com/alidootson/UpdatedCDISCPilotData/tree/main/UpdatedCDISCPilotData/CDASH/datasetjson

[chowsanthony]

Right. Should we just copy over the entire tree from /main/UpdatedCDISCPilotData/CDASH? This will also include to CSV and SAS datasets, as well as NDJSON.