[K/JS] Use intrinsics instead of new functions in IR backend.

libraries/stdlib/js-ir/runtime/jsIntrinsics.kt

@@ -117,6 +117,10 @@ internal fun jsBitShiftL(a: Any?, b: Any?): Int
 @JsIntrinsic
 internal fun jsInstanceOfIntrinsic(a: Any?, b: Any?): Boolean
 
+// @JsIntrinsic
+//  To prevent people to insert @OptIn every time
+public external fun jsTypeOf(a: Any?): String
+
 @JsIntrinsic
 internal fun jsNewTarget(a: Any?): Any?
 
@@ -216,4 +220,4 @@ internal fun <reified T : Any> jsClassIntrinsic(): JsClass<T>
 internal fun jsInIntrinsic(lhs: Any?, rhs: Any): Boolean
 
 @JsIntrinsic
-internal fun jsDelete(e: Any?)
+internal fun jsDelete(e: Any?)