mlx safetensors stablelm causal-lm custom_code en de es fr it nl pt dataset:tiiuae/falcon-refinedweb dataset:togethercomputer/RedPajama-Data-1T dataset:uonlp/CulturaX dataset:CarperAI/pilev2-dev dataset:bigcode/starcoderdata dataset:DataProvenanceInitiative/Commercially-Verified-Licenses license:other region:us