Root AI framework updates

[stevenle]

Description

• Switch from server-side API to a client-side serverless library, e.g.: https://firebase.google.com/products/firebase-ai-logic
• Switch to "streaming" calls so that AI responses are rendered as new text comes in
• Add "tools" for reading/writing docs along with other common tasks, e.g.: https://firebase.google.com/docs/ai-logic/function-calling?api=dev
  • This is similar to MCP but is passed to the function call directly
• Graduate from "experimental" to a top-level config ai within cmsPlugin()
• Explore "thinking/reasoning" flows/patterns for the generic AI chat interfaces, e.g.: https://docs.langchain.com/oss/python/deepagents/overview
  • This needs more discovery as I'm sure there are libraries that already exist for repeated AI calls