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/loan_icons.json

@@ -0,0 +1,19 @@
+[
+  {
+    "id": "card_icon_loan_001",
+    "name": "The Maestro (Loan)",
+    "overall": 94,
+    "position": "CAM",
+    "nation": "France",
+    "league": "Icons",
+    "club": "Icons",
+    "pace": 82,
+    "shooting": 88,
+    "passing": 95,
+    "dribbling": 92,
+    "defending": 60,
+    "physical": 72,
+    "rarity": "icon",
+    "image_path": null
+  }
+]