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/2018/worldcup.stadiums.json

@@ -0,0 +1,52 @@
+{
+  "stadiums": [
+    {
+      "name": "Kazan Arena",
+      "city": "Kazan"
+    },
+    {
+      "name": "Fisht Olympic Stadium",
+      "city": "Sochi"
+    },
+    {
+      "name": "Luzhniki Stadium",
+      "city": "Moscow"
+    },
+    {
+      "name": "Nizhny Novgorod Stadium",
+      "city": "Nizhny Novgorod"
+    },
+    {
+      "name": "Cosmos Arena",
+      "city": "Samara"
+    },
+    {
+      "name": "Rostov Arena",
+      "city": "Rostov-on-Don"
+    },
+    {
+      "name": "Krestovsky Stadium",
+      "city": "Saint Petersburg"
+    },
+    {
+      "name": "Otkritie Arena",
+      "city": "Moscow"
+    },
+    {
+      "name": "Central Stadium",
+      "city": "Yekaterinburg"
+    },
+    {
+      "name": "Volgograd Arena",
+      "city": "Volgograd"
+    },
+    {
+      "name": "Mordovia Arena",
+      "city": "Saransk"
+    },
+    {
+      "name": "Kaliningrad Stadium",
+      "city": "Kaliningrad"
+    }
+  ]
+}