Add files (#3826)

docs/guides/binary/blob-to-stream.md

@@ -0,0 +1,14 @@
+---
+name: Convert a Blob to a ReadableStream
+---
+
+The [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) class provides a number of methods for consuming its contents in different formats, inluding `.stream()`. This returns `Promise<ReadableStream>`.
+
+```ts
+const blob = new Blob(["hello world"]);
+const stream = await blob.stream();
+```
+
+---
+
+See [Docs > API > Binary Data](/docs/api/binary-data#conversion) for complete documentation on manipulating binary data with Bun.