refactor: rename data/openfootball → data/wikipedia, drop data/kaggle

Move world_cup.csv to app/data/ directly (the only remaining Kaggle file
used by seed.ts for tournament metadata). Delete the rest of the Kaggle CSVs.
Update path constants in scrape-wikipedia.ts and seed.ts accordingly.

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

app/data/wikipedia/1982/worldcup.groups.json

@@ -0,0 +1,90 @@
+{
+  "groups": [
+    {
+      "name": "Group 1",
+      "teams": [
+        "Italy",
+        "Poland",
+        "Peru",
+        "Cameroon"
+      ]
+    },
+    {
+      "name": "Group 2",
+      "teams": [
+        "West Germany",
+        "Algeria",
+        "Chile",
+        "Austria"
+      ]
+    },
+    {
+      "name": "Group 3",
+      "teams": [
+        "Argentina",
+        "Belgium",
+        "Hungary",
+        "El Salvador"
+      ]
+    },
+    {
+      "name": "Group 4",
+      "teams": [
+        "England",
+        "France",
+        "Czechoslovakia",
+        "Kuwait"
+      ]
+    },
+    {
+      "name": "Group 5",
+      "teams": [
+        "Spain",
+        "Honduras",
+        "Yugoslavia",
+        "Northern Ireland"
+      ]
+    },
+    {
+      "name": "Group 6",
+      "teams": [
+        "Brazil",
+        "Soviet Union",
+        "Scotland",
+        "New Zealand"
+      ]
+    },
+    {
+      "name": "Group A",
+      "teams": [
+        "Poland",
+        "Belgium",
+        "Soviet Union"
+      ]
+    },
+    {
+      "name": "Group B",
+      "teams": [
+        "West Germany",
+        "England",
+        "Spain"
+      ]
+    },
+    {
+      "name": "Group C",
+      "teams": [
+        "Italy",
+        "Argentina",
+        "Brazil"
+      ]
+    },
+    {
+      "name": "Group D",
+      "teams": [
+        "Austria",
+        "France",
+        "Northern Ireland"
+      ]
+    }
+  ]
+}

app/data/wikipedia/1982/worldcup.stadiums.json

@@ -0,0 +1,80 @@
+{
+  "stadiums": [
+    {
+      "name": "Camp Nou",
+      "city": "Barcelona"
+    },
+    {
+      "name": "Ramón Sánchez Pizjuán Stadium",
+      "city": "Seville"
+    },
+    {
+      "name": "Estadio José Rico Pérez",
+      "city": "Alicante"
+    },
+    {
+      "name": "Santiago Bernabéu",
+      "city": "Madrid"
+    },
+    {
+      "name": "Balaídos",
+      "city": "Vigo"
+    },
+    {
+      "name": "Estadio de Riazor",
+      "city": "A Coruña"
+    },
+    {
+      "name": "El Molinón",
+      "city": "Gijón"
+    },
+    {
+      "name": "Estadio Carlos Tartiere",
+      "city": "Oviedo"
+    },
+    {
+      "name": "Nuevo Estadio",
+      "city": "Elche"
+    },
+    {
+      "name": "San Mamés",
+      "city": "Bilbao"
+    },
+    {
+      "name": "Estadio José Zorrilla",
+      "city": "Valladolid"
+    },
+    {
+      "name": "Estadio Luis Casanova",
+      "city": "Valencia"
+    },
+    {
+      "name": "La Romareda",
+      "city": "Zaragoza"
+    },
+    {
+      "name": "Ramón Sánchez Pizjuán",
+      "city": "Seville"
+    },
+    {
+      "name": "La Rosaleda Stadium",
+      "city": "Málaga"
+    },
+    {
+      "name": "Estadio Benito Villamarín",
+      "city": "Seville"
+    },
+    {
+      "name": "Sarrià Stadium",
+      "city": "Barcelona"
+    },
+    {
+      "name": "Estadio Sarriá",
+      "city": "Barcelona"
+    },
+    {
+      "name": "Vicente Calderón",
+      "city": "Madrid"
+    }
+  ]
+}