doc: add writable and readable options to Duplex docs

Fixes: #34382

PR-URL: #34383
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>

Author: preyunk

doc/api/stream.md

@@ -2412,6 +2412,10 @@ changes:
   * `allowHalfOpen` {boolean} If set to `false`, then the stream will
     automatically end the writable side when the readable side ends.
     **Default:** `true`.
+  * `readable` {boolean} Sets whether the `Duplex` should be readable.
+    **Default:** `true`.
+  * `writable` {boolean} Sets whether the `Duplex` should be writable.
+    **Default:** `true`.
   * `readableObjectMode` {boolean} Sets `objectMode` for readable side of the
     stream. Has no effect if `objectMode` is `true`. **Default:** `false`.
   * `writableObjectMode` {boolean} Sets `objectMode` for writable side of the