refactor: consolidate data/ into single root directory, fix historical player names

Merge data/wikipedia/{year}/ into data/{year}/ so there is a single
canonical location for World Cup JSON files. Update scrape and seed
scripts to use data/ instead of data/wikipedia/.

Re-scraped all 22 years (1930-2022) with fixed player name extraction
(full name from <a title="..."> rather than abbreviated display text)
so historical goals now show e.g. "Thomas Müller" not "Müller".

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/seed.ts

@@ -9,7 +9,7 @@ import { normalizeTeam } from '../lib/wiki-scraper'
 
 const DATABASE_URL = process.env.DATABASE_URL ?? 'postgres://wc:wc@localhost:5432/worldcup'
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
-const WC_DIR = path.join(__dirname, '../data/wikipedia')
+const WC_DIR = path.join(__dirname, '../data')
 
 const YEARS = [
   1930,1934,1938,1950,1954,1958,1962,1966,1970,1974,