* Update diagram with details of Android, iOS, and Pyodide builds * Update diagram as well * Simplify Co-Authored-By: Malcolm Smith <smith@chaquo.com> * Improve WCAG for some text elements * Update diagram snapshot * Modernise image generation script and rerun --------- Co-authored-by: Malcolm Smith <smith@chaquo.com> Co-authored-by: Joe Rickerby <joerick@mac.com>