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/1994/worldcup.stadiums.json

@@ -0,0 +1,40 @@
+{
+  "stadiums": [
+    {
+      "name": "Soldier Field",
+      "city": "Chicago"
+    },
+    {
+      "name": "RFK Stadium",
+      "city": "Washington, D.C."
+    },
+    {
+      "name": "Cotton Bowl",
+      "city": "Dallas"
+    },
+    {
+      "name": "Rose Bowl",
+      "city": "Pasadena"
+    },
+    {
+      "name": "Citrus Bowl",
+      "city": "Orlando"
+    },
+    {
+      "name": "Stanford Stadium",
+      "city": "Stanford"
+    },
+    {
+      "name": "Foxboro Stadium",
+      "city": "Foxborough"
+    },
+    {
+      "name": "Giants Stadium",
+      "city": "East Rutherford"
+    },
+    {
+      "name": "Pontiac Silverdome",
+      "city": "Pontiac"
+    }
+  ]
+}