Connectivity test: add a Turkey country list

We ship country-focused connectivity lists (Iran, Russia, China, Brazil) so people can quickly check which major services are reachable from/for that country. Turkey is a frequently requested gap — and if you're familiar with the Turkish internet, you know better than we do which sites matter.

Same recipe as the other list issues: id: 'turkey', emoji , ≥10 members mixing global services that matter locally with major Turkish platforms (e.g. Trendyol, Hepsiburada, Sahibinden, Ekşi Sözlük…), names in all four locale packs, favicons auto-fetched by pnpm test and committed.

pnpm check green; comment to claim; PR targets dev.