Add new ChatGPT client

[AndraxDev]

Hello! Last year I created my own mobile client SpeakGPT with a lot of features and API key setup in MD3 design. Can you please add it. Github link: https://github.com/AndraxDev/speak-gpt

It have some interesting features like Assistant mode, text access from most off apps, Prompts Store where users can add their own prompts for GPT and DALL-e, a lot of settings and customizations, lightweight app. Of couse it supports common features like image generation, model selection, GPT 4 Vision, etc. Thanks for collaborating!