Add the Llama and Stable Diffusion examples

llama/README.md

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+# LLaMA
+
+An example of generating text with LLaMA using MLX.
+
+LLaMA is a set of open source language models from Meta AI Research[^1] ranging from 7B to 65B parameters.
+
+### Setup
+
+Install the dependencies:
+
+```
+pip install -r requirements.txt
+```
+
+Next, download and convert the model. If you do not have access to the model
+weights you will need to [request
+access](https://docs.google.com/forms/d/e/1FAIpQLSfqNECQnMkycAp2jP4Z9TFX0cGR4uf7b_fBxjY_OjhJILlKGA/viewform)
+from Meta.
+
+Convert the weights with:
+
+```
+python convert.py <path_to_torch_weights> mlx_llama_weights.npz
+```
+
+### Run
+
+Once you've converted the weights to MLX format, you can interact with the
+LLaMA model:
+
+```
+python llama.py mlx_llama.npz tokenizer.model "hello"
+```
+
+Run `python llama.py --help` for more details.
+
+[^1]: Refer to the [arXiv paper](https://arxiv.org/abs/2302.13971) and [blog post](https://ai.meta.com/blog/large-language-model-llama-meta-ai/) for more details.