Feature request: artifact-style UI #149

When using Anthropic's Claude via the official web UI, longer-form content (like code files) are saved as artifacts that can be copied and downloaded, outside of the main conversation flow. I don't believe that Anthropic offers access to this functionality via the API, but it would be great if BasiliskLLM could offer some easy way of listing, saving, and copying significant blocks of content from the message history. By "significant blocks", I'm thinking the sorts of things ChatGPT and Claude's web UIs provide a copy button for, which are hopefully wrapped in some way to allow for identification in API responses (backticks?).