add world opinions project

World map with switchable layers (what "liberal" means, what left vs right
is about, traditional/secular and survival/self-expression values), country
cards, a shared-scale party compass, a values scatter and national
narratives of major events.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/routes/sitemap.xml/+server.ts

@@ -13,7 +13,8 @@ const staticPaths = [
 	'/projects/catch-em-all',
 	'/projects/animaldex',
 	'/projects/derby',
-	'/projects/spotify-beatmap-finder'
+	'/projects/spotify-beatmap-finder',
+	'/projects/world-opinions'
 ];
 
 function escapeXml(value: string): string {