feat: replace Kaggle CSV with Wikipedia scraper for historical match data

Add scripts/scrape-wikipedia.ts that fetches all 22 World Cups (1930–2022)
from English Wikipedia via MediaWiki API, handles group sub-pages, AET/penalty
detection, and goal parsing, writing openfootball-format JSON to app/data/openfootball/.

Rewrite scripts/seed.ts to read these local JSON files instead of the Kaggle
CSV, producing 965 matches and 2716 goals with per-group assignments for all
historical tournaments (enabling group standings on tournament pages).

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

app/data/openfootball/1978/worldcup.stadiums.json

@@ -0,0 +1,48 @@
+{
+  "stadiums": [
+    {
+      "name": "River Plate Stadium",
+      "city": "Buenos Aires"
+    },
+    {
+      "name": "Estadio José María Minella",
+      "city": "Mar del Plata"
+    },
+    {
+      "name": "Estadio Monumental",
+      "city": "Buenos Aires"
+    },
+    {
+      "name": "Estadio Gigante de Arroyito",
+      "city": "Rosario"
+    },
+    {
+      "name": "Estadio Chateau Carreras",
+      "city": "Córdoba"
+    },
+    {
+      "name": "Estadio Olímpico Chateau Carreras",
+      "city": "Córdoba"
+    },
+    {
+      "name": "Estadio José Amalfitani",
+      "city": "Buenos Aires"
+    },
+    {
+      "name": "Estadio José Maria Minella",
+      "city": "Mar del Plata"
+    },
+    {
+      "name": "Chateau Carreras",
+      "city": "Córdoba"
+    },
+    {
+      "name": "Estadio Ciudad de Mendoza",
+      "city": "Mendoza"
+    },
+    {
+      "name": "Estadio Malvinas Argentinas",
+      "city": "Mendoza"
+    }
+  ]
+}