[Feature Request] MLX_lm: add support for GLM4 family of language models

[Nekuromento]

There's a new family of language models from THUDM: GLM-4, LongWriter, CodeGeex4

[viljark]

Definitely would like to see support for CodeGeex4, it is my go-to local coding model.

[HydrogenBombaklot]

GLM 4 9B tops the HHEM Hallucination Leaderboard as the LLM model with the lowest hallucination rate of all models tested. I definitely want to see it supported too.