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/bytes/ends_with.ts

@@ -0,0 +1,25 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+/** Returns true if the suffix array appears at the end of the source array,
+ * false otherwise.
+ *
+ * The complexity of this function is O(suffix.length).
+ *
+ * ```ts
+ * import { endsWith } from "https://deno.land/std@$STD_VERSION/bytes/ends_with.ts";
+ * const source = new Uint8Array([0, 1, 2, 1, 2, 1, 2, 3]);
+ * const suffix = new Uint8Array([1, 2, 3]);
+ * console.log(endsWith(source, suffix)); // true
+ * ```
+ */
+export function endsWith(source: Uint8Array, suffix: Uint8Array): boolean {
+  for (
+    let srci = source.length - 1, sfxi = suffix.length - 1;
+    sfxi >= 0;
+    srci--, sfxi--
+  ) {
+    if (source[srci] !== suffix[sfxi]) return false;
+  }
+  return true;
+}