AI Agent Support: Page Introspection API

[Rasukarusan]

Summary

Add functions that let AI understand the overall page structure. This is the most important change for AI agent support.

Priority: Highest

Current Problem

There is no way for AI to get an overview of the page. find_element assumes the caller already knows the selector.

AI needs a way to discover "what is on this page."

Proposal

get_clickable_elements     # List of clickable elements (a, button, input[type=submit], etc.)
get_form_fields            # List of form fields (name, type, placeholder, etc.)
get_page_summary           # Title + URL + main text + links as JSON
get_element_info "$element"  # All attributes of a single element as JSON