Update SpecFormer test parquet 00012-00015

Update SpecFormer test parquet 00000-00011

Update SpecFormer val parquet 00012-00015

Update SpecFormer val parquet 00000-00011

Update SpecFormer dataset metadata

Add SpecFormer dataset manifest

Delete source_manifest.original.json

Delete merged_stats.json

Delete manifest.json

Delete dedup_stats.json

Delete README_旧版格式参考.md

Delete README_windows_friendly_format.md

Upload parquet dataset files

Update README.md

initial commit