Add upload stream example for Deno

examples/deno/upload_stream.ts

@@ -0,0 +1,12 @@
+import { readableStreamFromReader } from "https://deno.land/std@0.111.0/streams/conversion.ts";
+import { client, login } from "./mod.ts";
+
+await login();
+
+const file = prompt("Path of the file to be uploaded:")!;
+const blob = await new Response(readableStreamFromReader(await Deno.open(file))).blob();
+
+const document = await client.cdn.upload(blob);
+
+console.log("Uploaded successfully.");
+console.log("Document ID:", document.id);