Updates documentation to clarify that script primitives use CSS
selectors instead of backendNodeIds. Explains how to use `/nodeDetails`
to get selectors. Clarifies the difference in `/save` behavior
between `--no-llm` and LLM modes.
Updates agent-related documentation to reflect recent changes:
- Removes obsolete `follow` option from `extract` schema.
- Documents automatic printing of the script's final expression.
- Adds details on Ollama auto-detection and new CLI flags.
- Documents the `/logout` command and updated tool list.
Replace recorded agent replay with a standalone JavaScript script runtime.
Install synchronous agent primitives in an isolated V8 context, add console
output, return structured extract values as JS objects/arrays, and route script
execution through the new runtime.
Update recording to emit .js function calls, default /save filenames to .js,
drop script-level extract save support, and refresh agent docs/tutorials for
the new format.
Self-healing is disabled for now.
