doc: add example to fs.promises.readdir

PR-URL: #31552 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rich Trott <[email protected]>

Author: conoro

doc/api/fs.md

@@ -4921,6 +4921,18 @@ will be passed as `Buffer` objects.
 If `options.withFileTypes` is set to `true`, the resolved array will contain
 [`fs.Dirent`][] objects.
 
+```js
+constfs=require('fs');
+
+asyncfunctionprint(path){
+constfiles=awaitfs.promises.readdir(path);
+for (constfileof files){
+console.log(file);
+ }
+}
+print('./').catch(console.error);
+```
+
 ### `fsPromises.readFile(path[, options])`
 <!-- YAML
 added: v10.0.0