Add support for Llava-Next (v1.6)

[Blaizzy]

Changes:

• Add Llava-Next

Closes #42

[jrp2014]

Is there a README / example usage script for this one, please?

[Blaizzy]

It works just like llava-1.5

import mlx.core as mx
from mlx_vlm import load, generate

model_path = "mlx-community/llava-1.6-mistral-7b-4bit"
model, processor = load(model_path)

prompt = processor.tokenizer.apply_chat_template(
    [{"role": "user", "content": f"<image>\nWhat are these?"}],
    tokenize=False,
    add_generation_prompt=True,
)

output = generate(model, processor, "http://images.cocodataset.org/val2017/000000039769.jpg", prompt, verbose=False)