Initial commit: OpenFUT Core + Bridge scaffold

Two-repo monorepo for an offline FUT backend inspired by SPT.

openfut-core: game-independent REST API backend (Axum, SQLite, SQLx)
- 19 API endpoints: auth, profiles, clubs, cards, packs, squads,
  objectives, SBCs, match rewards, NPC market, statistics
- JSON-driven card/pack/objective/SBC data (fully moddable)
- SQLx migrations, weighted pack generator, SBC validation engine
- 5 integration tests passing

openfut-bridge: FIFA 23 traffic proxy + reverse-engineering scaffold
- Catch-all HTTP proxy with request capture to captures/
- Known-route mapper (FUT paths → Core API calls)
- Placeholder responses for unknown endpoints
- Admin endpoints: captures, unknown endpoint list
- 4 unit tests passing

cargo fmt ✓  cargo clippy -D warnings ✓  cargo test ✓

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

openfut-core/data/cards/gold_sample.json

@@ -0,0 +1,87 @@
+[
+  {
+    "id": "card_gold_001",
+    "name": "Alejandro Vargas",
+    "overall": 82,
+    "position": "ST",
+    "nation": "Argentina",
+    "league": "Primera Division",
+    "club": "River Plate",
+    "pace": 85,
+    "shooting": 84,
+    "passing": 72,
+    "dribbling": 80,
+    "defending": 40,
+    "physical": 78,
+    "rarity": "gold",
+    "image_path": null
+  },
+  {
+    "id": "card_gold_002",
+    "name": "Thomas Beaumont",
+    "overall": 80,
+    "position": "CM",
+    "nation": "France",
+    "league": "Ligue 2",
+    "club": "FC Toulouse",
+    "pace": 72,
+    "shooting": 74,
+    "passing": 83,
+    "dribbling": 78,
+    "defending": 68,
+    "physical": 74,
+    "rarity": "gold",
+    "image_path": null
+  },
+  {
+    "id": "card_gold_003",
+    "name": "Dimitri Kovalenko",
+    "overall": 81,
+    "position": "CB",
+    "nation": "Ukraine",
+    "league": "Premier League UA",
+    "club": "Shakhtar Donetsk",
+    "pace": 75,
+    "shooting": 38,
+    "passing": 65,
+    "dribbling": 60,
+    "defending": 83,
+    "physical": 82,
+    "rarity": "gold",
+    "image_path": null
+  },
+  {
+    "id": "card_gold_004",
+    "name": "Felipe Moura",
+    "overall": 83,
+    "position": "LW",
+    "nation": "Brazil",
+    "league": "Brasileirao",
+    "club": "Palmeiras",
+    "pace": 88,
+    "shooting": 80,
+    "passing": 76,
+    "dribbling": 86,
+    "defending": 44,
+    "physical": 68,
+    "rarity": "gold",
+    "image_path": null
+  },
+  {
+    "id": "card_gold_005",
+    "name": "Lars Eriksson",
+    "overall": 79,
+    "position": "GK",
+    "nation": "Sweden",
+    "league": "Allsvenskan",
+    "club": "Malmo FF",
+    "pace": 45,
+    "shooting": 12,
+    "passing": 58,
+    "dribbling": 32,
+    "defending": 80,
+    "physical": 76,
+    "rarity": "gold",
+    "image_path": null
+  }
+]