Connectivity test: add sites to an existing import list

An open-ended starter: if a major site is missing from one of our curated lists (frontend/data/connectivity-import-lists.js — AI, social, streaming, gaming, developer, cloud, crypto, e-commerce, news, and the country lists), add it.

• One object in the list's members array (see neighbors for the shape; the URL is the site's own https://…/favicon.ico).
• Run pnpm test locally — the missing favicon is auto-downloaded into public/favicons/; commit the PNG with your change.
• Hostnames must be unique within a list; lists have a size cap the test enforces.

Please propose the site in a comment first (one site or a small related batch per PR) so we can sanity-check it's a good fit. PR targets dev.