Added a very complicated AsyncIterableReader class.

The class was already implemented in
"https://deno.land/std@0.144.0/streams/conversion.ts".  So, I litterally
lost 1 day of work!  I hate myself.

vendor/deno.land/std@0.188.0/io/mod.ts

@@ -0,0 +1,27 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+/**
+ * Utilities for working with Deno's readers, writers, and web streams.
+ *
+ * `Reader` and `Writer` interfaces are deprecated in Deno, and so many of these
+ * utilities are also deprecated. Consider using web streams instead.
+ *
+ * @module
+ */
+
+export * from "./buf_reader.ts";
+export * from "./buf_writer.ts";
+export * from "./buffer.ts";
+export * from "./copy_n.ts";
+export * from "./limited_reader.ts";
+export * from "./multi_reader.ts";
+export * from "./read_delim.ts";
+export * from "./read_int.ts";
+export * from "./read_lines.ts";
+export * from "./read_long.ts";
+export * from "./read_range.ts";
+export * from "./read_short.ts";
+export * from "./read_string_delim.ts";
+export * from "./slice_long_to_bytes.ts";
+export * from "./string_reader.ts";
+export * from "./string_writer.ts";