doc: added ready events to fs/streams,net/socket

PR-URL: nodejs#19968
Fixes: nodejs#19796
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: towc

doc/api/fs.md

@@ -364,6 +364,15 @@ added: v0.1.93
 
 Emitted when the `fs.ReadStream`'s file descriptor has been opened.
 
+### Event: 'ready'
+<!-- YAML
+added: v9.11.0
+-->
+
+Emitted when the `fs.ReadStream` is ready to be used.
+
+Fires immediately after `'open'`.
+
 ### readStream.bytesRead
 <!-- YAML
 added: v6.4.0
@@ -679,6 +688,15 @@ added: v0.1.93
 
 Emitted when the `WriteStream`'s file is opened.
 
+### Event: 'ready'
+<!-- YAML
+added: v9.11.0
+-->
+
+Emitted when the `fs.WriteStream` is ready to be used.
+
+Fires immediately after `'open'`.
+
 ### writeStream.bytesWritten
 <!-- YAML
 added: v0.4.7

doc/api/net.md

@@ -485,6 +485,15 @@ Not applicable to UNIX sockets.
 * `family` {string|null} The address type. See [`dns.lookup()`][].
 * `host` {string} The hostname.
 
+### Event: 'ready'
+<!-- YAML
+added: v9.11.0
+-->
+
+Emitted when a socket is ready to be used.
+
+Triggered immediately after `'connect'`.
+
 ### Event: 'timeout'
 <!-- YAML
 added: v0.1.90