refactor: consolidate data/ into single root directory, fix historical player names

Merge data/wikipedia/{year}/ into data/{year}/ so there is a single
canonical location for World Cup JSON files. Update scrape and seed
scripts to use data/ instead of data/wikipedia/.

Re-scraped all 22 years (1930-2022) with fixed player name extraction
(full name from <a title="..."> rather than abbreviated display text)
so historical goals now show e.g. "Thomas Müller" not "Müller".

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

data/2002/worldcup.stadiums.json

@@ -76,30 +76,18 @@
       "name": "Munsu Football Stadium",
       "city": "Ulsan"
     },
-    {
-      "name": "Niigata Stadium",
-      "city": "Niigata"
-    },
-    {
-      "name": "Sapporo Dome",
-      "city": "Sapporo"
-    },
     {
       "name": "Kashima Soccer Stadium",
       "city": "Ibaraki"
     },
-    {
-      "name": "Ecopa Stadium",
-      "city": "Shizuoka"
-    },
-    {
-      "name": "International Stadium Yokohama",
-      "city": "Yokohama"
-    },
     {
       "name": "Wing Stadium",
       "city": "Kobe"
     },
+    {
+      "name": "Sapporo Dome",
+      "city": "Sapporo"
+    },
     {
       "name": "Niigata Big Swan Stadium",
       "city": "Niigata"
@@ -108,6 +96,10 @@
       "name": "Ōita Big Eye Stadium",
       "city": "Ōita"
     },
+    {
+      "name": "International Stadium Yokohama",
+      "city": "Yokohama"
+    },
     {
       "name": "Shizuoka Ecopa Stadium",
       "city": "Fukuroi, Shizuoka"