Initial ES modules support

lib/stdlib/io.js

@@ -5,6 +5,18 @@
 // A failure rejects with the negative errno, not an `Error`. A read or a write
 // that the kernel does not finish in one op is not continued
 
+import {
+    __native_io_queue_close,
+    __native_io_queue_open,
+    __native_io_queue_read,
+    __native_io_queue_stat,
+    __native_io_queue_write,
+    __native_io_result_number,
+    __native_io_result_string,
+    __native_io_status,
+} from "jsrt:native";
+import { __pending } from "jsrt:loop";
+
 // A promise of what op `h` gives when it completes: its status, its data, or
 // a number. A result can only be read before the next wait, so these read it
 // when the op completes
@@ -39,7 +51,7 @@ function __io_ok(h) {
     return __io_status(h).then((status) => (status < 0 ? Promise.reject(status) : status));
 }
 
-const fs = {
+export const fs = {
     readFile(path) {
         let fd = -1;
         let text = "";