v0.5.0: Multiagent, Multimodality and LeChat

This minor release provides the following new features:

• Multimodal support for Copilot and Gemini: Users can now upload images within Copilot and Gemini, enabling multimodal interactions.
• Automation of Mistral LeChat: New chat head has arrived!
• Multiagent: Engage with multiple agents simultaneously, allowing them to interact with one another
• Conversation: Simulate conversations using two chatbots, providing a more natural and immersive experience.
• Pi reset_thread: It is now possible to reset chat in Pi

Other changes:

• Several bugs were fixed for ChatGPT, Copilot, and Gemini.
• Documentation of multiagent and conversation
• Fixed typos