Publish unified sft/pretrain parquet splits

Delete files sft.parquet pretrain.parquet sft-00000-of-00001.parquet pretrain-00000-of-00001.parquet with huggingface_hub

Unify parquet schema across sft/pretrain splits

fix readme and layout

test

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Upload pretrain.parquet with huggingface_hub

Upload sft.parquet with huggingface_hub

Upload dataset

Upload README.md with huggingface_hub

initial commit