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/scrape-wikipedia.ts

@@ -1,6 +1,6 @@
 /**
  * Scrape English Wikipedia for World Cup data and write JSON files to
- * data/wikipedia/{year}/.
+ * data/{year}/.
  *
  * Usage:
  *   pnpm scrape                  # all years, matches + squads
@@ -17,7 +17,7 @@ import {
 } from '../lib/wiki-scraper'
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
-const DATA_DIR = path.join(__dirname, '../data/wikipedia')
+const DATA_DIR = path.join(__dirname, '../data')
 
 const YEARS = [
   1930,1934,1938,1950,1954,1958,1962,1966,1970,1974,
@@ -95,7 +95,7 @@ async function main() {
     console.log()
   }
 
-  console.log('\nDone! Files written to data/wikipedia/{year}/')
+  console.log('\nDone! Files written to data/{year}/')
 }
 
 main().catch(e => { console.error(e); process.exit(1) })