fix(ci): generate route types before typechecking a fresh checkout

package.json

@@ -18,7 +18,7 @@
     "build": "next build --turbopack",
     "start": "next start",
     "lint": "biome check",
-    "typecheck": "tsc --noEmit",
+    "typecheck": "next typegen && tsc --noEmit",
     "format": "biome format --write",
     "test": "jest",
     "test:watch": "jest --watch",