* fix for cohere plus * version bump
* use nn.RMSNorm, use sdpa, cleanup * bump mlx versions * minor update * use fast layer norm * version bump * update requirement for whisper * update requirement for gguf
* initial commit for command-R * update mlp, layernorm, lm_head and model args * add custom layernorm * add default to tie_word_embeddings * add layernorm weight type and refactor * update layernorm (bias conditional) in model/layers * fix layer norm use traditional rope * add test --------- Co-authored-by: Awni Hannun <awni@apple.com>