Add LLM optimized documentation

[olafgeibig]

Enhancement

When using AI coding assistants it is very helpful to have a version of the documentation that is on a single page and optimized for LLMs, usually markdown source seems to be a good idea. There is also llmstxt for this purpose but addresses a wider use case, generally making website content better understandable for LLMs. IMHO both approaches would be great.

Examples

• Jina API docs as single markdown page: https://docs.jina.ai/
• FastHTML docs as llmstxt page: https://docs.fastht.ml/llms-ctx-full.txt