feat(sdk): ensure sdk clients are not global, change open() to return document handle#2497

harbournick merged 3 commits intomainsuperdoc-dev/superdoc:mainfrom

nick/it-746-cross-document-contamination-between-pythonsuperdoc-dev/superdoc:nick/it-746-cross-document-contamination-between-pythonCopy head branch name to clipboard