Experimental - Add Groq support

[akio-ito]

Groq Api: https://console.groq.com/docs/quickstart

Python Install groq

pip install groq

Plug 'akio-ito/vim-ai'

.vimrc

let g:vim_ai_chat = {
\  "options": {
\    "endpoint_url": "https://api.groq.com/openai/v1/chat/completions",
\    "model": "mixtral-8x7b-32768",
\    "temperature": 0.2,
\  },
\  "ui": {
\    "open_chat_command": "tabnew | call vim_ai#MakeScratchWindow()",
\  },
\}

My dotfile: https://github.com/akioito/dotfiles