doc: update REPL documentation to instantiate the REPL

The documentation currently states that it's not intended to directly
instantiate REPL instances. It is unknown for what reason that's
recommended as it does seem a proper way to handle new REPL instances.

PR-URL: #30928
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/repl.md

@@ -332,10 +332,20 @@ function myWriter(output) {
 added: v0.1.91
 -->
 
+* `options` {Object|string} See [`repl.start()`][]
 * Extends: {readline.Interface}
 
-Instances of `repl.REPLServer` are created using the `repl.start()` method and
-*should not* be created directly using the JavaScript `new` keyword.
+Instances of `repl.REPLServer` are created using the [`repl.start()`][] method
+or directly using the JavaScript `new` keyword.
+
+```js
+const repl = require('repl');
+
+const options = { useColors: true };
+
+const firstInstance = repl.start(options);
+const secondInstance = new repl.REPLServer(options);
+```
 
 ### Event: `'exit'`
 <!-- YAML
@@ -697,6 +707,7 @@ For an example of running a REPL instance over [curl(1)][], see:
 [`process.setUncaughtExceptionCaptureCallback()`]: process.html#process_process_setuncaughtexceptioncapturecallback_fn
 [`readline.InterfaceCompleter`]: readline.html#readline_use_of_the_completer_function
 [`repl.ReplServer`]: #repl_class_replserver
+[`repl.start()`]: #repl_repl_start_options
 [`util.inspect()`]: util.html#util_util_inspect_object_options
 [curl(1)]: https://curl.haxx.se/docs/manpage.html
 [stream]: stream.html