v0.9.4

Changed

• The README on npm is now the same as the one on GitHub (it had drifted into
  a shorter, older version).
• Both READMEs show an animated preview of setting HelpPuff up by asking Claude
  Code, which plays in place on GitHub and npm.
• Both READMEs link to a 4-minute tour of every feature on YouTube.

Fixed

• The README's "Built for AI agents" section linked to a section that did not
  exist; it now points to "AI-agent first".
• The widget's size is given as about 41 KB gzipped in all (a 6 KB loader,
  then the 35 KB chat once the page is idle); it said 35 KB, leaving out the
  loader.