[Feature]: Create llm.txt automatically

[heiko-braun]

Is your feature request related to a problem?

Serving content to LLMs

Describe the solution you'd like

It would be nice if the build could auto generate a top level llm.txt and serve the raw markdown files behind it.

See https://llmstxt.org/#format for details.

Describe alternatives you've considered

No response

[mgks]

Sounds interesting, will surely look into it and update here. Thanks!