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/repeat.ts

@@ -0,0 +1,40 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+import { copy } from "./copy.ts";
+
+/** Returns a new Uint8Array composed of `count` repetitions of the `source`
+ * array.
+ *
+ * If `count` is negative, a `RangeError` is thrown.
+ *
+ * ```ts
+ * import { repeat } from "https://deno.land/std@$STD_VERSION/bytes/repeat.ts";
+ * const source = new Uint8Array([0, 1, 2]);
+ * console.log(repeat(source, 3)); // [0, 1, 2, 0, 1, 2, 0, 1, 2]
+ * console.log(repeat(source, 0)); // []
+ * console.log(repeat(source, -1)); // RangeError
+ * ```
+ */
+export function repeat(source: Uint8Array, count: number): Uint8Array {
+  if (count === 0) {
+    return new Uint8Array();
+  }
+
+  if (count < 0) {
+    throw new RangeError("bytes: negative repeat count");
+  }
+
+  if (!Number.isInteger(count)) {
+    throw new Error("bytes: repeat count must be an integer");
+  }
+
+  const nb = new Uint8Array(source.length * count);
+
+  let bp = copy(source, nb);
+
+  for (; bp < nb.length; bp *= 2) {
+    copy(nb.slice(0, bp), nb, bp);
+  }
+
+  return nb;
+}