export current workspace snapshot in affine

export.js

(async () => {
  // make sure ZipTransformer is imported and attached to window
  const { ZipTransformer } = window;
  await Promise.all([...currentWorkspace.blockSuiteWorkspace.pages.values()].map(p => p.load()));
  // wait for a few more seconds
  await new Promise(resolve => setTimeout(resolve, 5000));
  const zipblob = await ZipTransformer.exportPages(currentWorkspace.blockSuiteWorkspace, [...currentWorkspace.blockSuiteWorkspace.pages.values()]);
  const url = URL.createObjectURL(zipblob);
  const a = document.createElement('a');
  a.setAttribute('href', url);
  a.setAttribute('download', `${currentWorkspace.id}.affine.zip`);
  a.click();
  a.remove();
  URL.revokeObjectURL(url);
})()