v4.0.0-rc.6

Changes

• Polished the visual editor around a clearer setup flow: header, controls, target, extra entity rows, appearance, and advanced options.
• Added a simple extra entity row editor for common entity/name/icon setup.
• Moved precision, fallback text, custom labels, action type, and mode display options into Advanced.
• Updated README guidance for the editor-first v4 setup and YAML-only specialized options.
• Added README changelog entries for rc.5 and rc.6.

Validation

• npm test: 111 passed
• npm run typecheck: passed
• npm run build: passed