Correct Rongchao Chen affiliation; consolidate three author affiliations

Update authors and dataset card metadata

Add verified RELIX test file: RELIX-test-001.tar

Add verified RELIX test file: RELIX-test-002.tar

Add verified RELIX test file: RELIX-test-metadata.zip

Add verified RELIX test file: RELIX-test-001.files.json

Add verified RELIX test file: RELIX-test-002.files.json

Add verified RELIX test file: README.md

Add verified RELIX test file: UPLOAD_FILES.json

Add verified RELIX test file: DATASET.json

Add verified RELIX test file: SOURCE_ATTRIBUTION.md

Add verified RELIX test file: LICENSE

initial commit