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/1950/worldcup.stadiums.json

@@ -0,0 +1,32 @@
+{
+  "stadiums": [
+    {
+      "name": "Estádio do Maracanã",
+      "city": "Rio de Janeiro"
+    },
+    {
+      "name": "Estádio Independência",
+      "city": "Belo Horizonte"
+    },
+    {
+      "name": "Estádio do Pacaembu",
+      "city": "São Paulo"
+    },
+    {
+      "name": "Estádio dos Eucaliptos",
+      "city": "Porto Alegre"
+    },
+    {
+      "name": "Estádio Durival de Britto",
+      "city": "Curitiba"
+    },
+    {
+      "name": "Estádio Ilha do Retiro",
+      "city": "Recife"
+    },
+    {
+      "name": "Estádio Durival Britto",
+      "city": "Curitiba"
+    }
+  ]
+}