…o like iframes.

This will enable experimenting with re-introducing `slim` likeboxes to display likes without gravatars and other future changes.  Could also enable testing grounds of new changes before full UI for setting management is built out, or potentially to point more easily to a testing sandbox.

Companion to proposed changes WPCOM-side via phab diff D165404

I had to do a minor change to package.json locally to get pnpm to install -- `"pnpm": "^9.3.0 <9.15.0"` but it worked.

…rame.php

Co-authored-by: Jeremy Herve <[email protected]>

…ame-filter