stats: /stats/history and History, Politics and Culture sections on NL, Gouda, Curaçao, US and KR pages (step 4)

Long-run charts (Maddison, HYDE, UN via OWID; CBS and Pew religion), a filterable
sourced timeline, Wikidata office holders and turnout, Nager.Date holidays, UNESCO
sites, Wikidata people by sitelinks, curated food and cultural exports. Wikidata
labels now fall back to mul.

src/routes/stats/history/+page.server.ts

@@ -0,0 +1,4 @@
+import { loadHistoryOverview } from '#lib/server/stats-history.js';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async () => loadHistoryOverview();