Consider adopting guidelines for AI generated contributions

[jwm4]

There is a proposal for best practices for AI-Assisted contributions in open source at https://vibe-coding-manifesto.github.io/ . It includes elements like a PROMPTING.md file that open source communities can adopt and also guidance for developers that open source communities can promote. This approach or something like it might be a good fit for Docling repos in general. Since docling-sdg is relatively low profile (25 stars at the time I write this), it might be a good venue to try something like that out before potentially expanding it out to the rest of the Docling project.