[FEAT] Add the top LMSYS Chatbot Arena / HuggingChat / Poe LLM models

### Is your feature request related to a problem? / 你想要的功能和什么问题相关？

There are more models in [LMSYS Chatbot Arena](https://huggingface.co/spaces/lmsys/chatbot-arena) / [HuggingChat](https://huggingface.co/chat) / [Poe](https://poe.com) sites.

LMSYS
Poe

### Describe the solution you'd like. / 你想要的解决方案是什么？

I would like these top LLM models in [LMSYS Chatbot Arena](https://huggingface.co/spaces/lmsys/chatbot-arena) / [Poe](https://poe.com) available in ChatALL:

**mixtral-8x7b-instruct-v0.1** (also in HugginChat and Poe)
**mistral-7b-instruct** (also in Poe)
**gemini-pro** (Google's 2nd best LLM)
**gpt-4-turbo**
**claude-2.1**
**pplx-70b-online**
**openhermes-2.5-mistral-7b**
**starling-lm-7b-alpha**
**yi-34b-chat**
**openchat-3.5**

**Solar-0-70b** (Poe)

### Describe alternatives you've considered. / 你考虑过的其他方案是什么？

[Vercel AI Playground](https://sdk.vercel.ai) has Mistral mixtral-8x7b too.

### Additional context / 其他信息

The full list of top models available in LMSYS Chatbot Arena:

**mixtral-8x7b-instruct-v0.1**
mistral-7b-instruct
**gemini-pro**
gpt-3.5-turbo-0613
gpt-3.5-turbo-1106
**gpt-4-turbo**
**claude-2.1**
dolphin-2.2.1-mistral-7b
claude-2.0
claude-instant-l
**pplx-70b-online**
pplx-7b-online
**openhermes-2.5-mistral-7b**
**starling-lm-7b-alpha**
tulu-2-dpo-70b
**yi-34b-chat**
vicuna-33b
vicuna-13b
llama-2-70b-chat
llama-2-13b-chat
llama-2-7b-chat
chatglm3-6b
**openchat-3.5**
zephyr-7b-beta
qwen-14b-chat
codellama-34b-instruct
wizardlm-70b
falcon-180b-chat

LMSYS: https://chat.lmsys.org/ https://huggingface.co/spaces/lmsys/chatbot-arena
HuggingChat: https://huggingface.co/chat
Vercel AI Playground: https://sdk.vercel.ai/