Adding support for text artifacts (besides code artifacts)

[marcusschiesser]

Why

We already implemented code artifacts similar to Claude's code artifacts.

We're missing features for:

1. Generating text artifacts. (We can generate PDFs and HTML documents with the document_generator tool, but can't generate a text artifact without a file format like Claude.ai that is shown in a side panel).
2. Editing text or code artifacts

Claude doesn't support editing generated artifacts. ChatGPT has the Canvas feature for editing code or text.

What

Generate artifacts

For generating text artifacts, we need to add the following:

• T-1 modify document_generator to not generate a file output, but just markdown
• T-2 add an endpoint to download document markdown as HTML/PDF (similar to the sandbox endpoint that is executing code)
• T-3 extend artifact.tsx to text artifact and code artifact components that are viewing the artifacts
• T-4 jump between the artifacts versions like shown in https://x.com/vercel_changes/status/1854980020369768545
• T-5 tool outputs must also be rendered with workflows to ensure that the text artifact is shown when using one of the workflow use cases (same of course for code artifacts if we would have one)

Edit artifacts

Out of the scope of this ticket, but should be kept in mind when writing the code