Use tsgo

Author: gameroman

bun.lock

@@ -26,8 +26,8 @@
     "@biomejs/biome": "2.3.11",
     "@lichess-org/types": "^2.0.110",
     "@types/bun": "^1.3.6",
-    "tsdown": "^0.18.4",
-    "typescript": "^5.9.3"
+    "@typescript/native-preview": "^7.0.0-dev.20260116.1",
+    "tsdown": "^0.18.4"
   },
   "main": "./dist/index.mjs",
   "module": "./dist/index.mjs",