[Cookbook] Add Anyscale Endpoint cookbook

Clone the Getting Started cookbook and adapt it for Anyscale.
Next up we will also add a cookbook for function calling using Anyscale.

cookbooks/Anyscale/README.md

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+# Anyscale Endpoints with AIConfig
+
+[![colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/drive/1JgGjJ2YglyaT5GHQNswkPOyB5oHGbOcv?usp=sharing)
+
+[Anyscale Endpoints](https://www.anyscale.com/endpoints) support optimized inference for many open source models, including the LLaMA2 family of models (7B, 13B, 70B, CodeLLaMA, LLaMA Guard) and Mistral (7B, Mixtral 8x7B).
+
+This cookbook shows how to use any [Anyscale Endpoints](https://www.anyscale.com/endpoints) model with AIConfig using the same simple API.
+
+We cover:
+
+- Inference using Anyscale Endpoints
+- Prompt chains with multiple models
+
+Read more about [AIConfig for prompt and model management](https://github.com/lastmile-ai/aiconfig).
+
+## Models supported with Anyscale Endpoints
+
+For the complete list, please see https://app.endpoints.anyscale.com/docs
+
+- LLaMA-7B: meta-llama/Llama-2-7b-chat-hf
+- LLaMA-13B: meta-llama/Llama-2-13b-chat-hf
+- LLaMA-70B: meta-llama/Llama-2-70b-chat-hf
+- LLaMA Guard: Meta-Llama/Llama-Guard-7b
+- CodeLLaMA: codellama/CodeLlama-34b-Instruct-hf
+- Mistral-7B (OpenOrca): Open-Orca/Mistral-7B-OpenOrca
+- Mistral-7B: mistralai/Mistral-7B-Instruct-v0.1
+- Mixtral-8x7B: mistralai/Mixtral-8x7B-Instruct-v0.1
+- Zephyr: HuggingFaceH4/zephyr-7b-beta
+- GTE: thenlper/gte-large