Add a documentation page for AI tooling recommendations

[ericholscher]

We want to have a place to point folks who want AI integration with some suggestions for what we recommend for how to integrate things. The main things to focus on:

• "Ask AI" integrations
• Semantic search

[stsewd]

Maybe also recommend https://sphinx-llms-txt.readthedocs.io/en/latest/ for Sphinx projects.