Add LLMs.txt support for documentation

[WillNeill]

Is your feature request related to a problem? Please describe. I'd love to have your documentation available as an LLMs.txt so I can pass it to Claude Code for quick help or debugging suggestions.

Describe the solution you'd like

• [ ] Generate an LLMs.txt file as part of your site build step
• [ ] Add the LLMs.txt to Content7

Describe alternatives you've considered I've tried adding the documentation site directly to Content7, but it's a bit too fancy and fails to parse successfully.

Additional context Most of us are using AI-assisted development, particularly for documentation. It would be great to have these docs available in a convenient and easy query format.