js2ts: util.ts 분리

hwe/ts/util/unwrap_any.ts

@@ -1,4 +1,5 @@
-import { Nullable, NotNullExpected } from "../util";
+import { Nullable } from "./Nullable";
+import { NotNullExpected } from "./NotNullExpected";
 
 
 export function unwrap_any<T>(result: Nullable<unknown>): T {