doc: add fspromises mkdir example

Signed-off-by: Tierney Cyren <hello@bnb.im>

PR-URL: #40843
Reviewed-By: Adrian Estrada <edsadr@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/fs.md

@@ -1053,6 +1053,34 @@ property indicating whether parent directories should be created. Calling
 `fsPromises.mkdir()` when `path` is a directory that exists results in a
 rejection only when `recursive` is false.
 
+```mjs
+import { mkdir } from 'node:fs/promises';
+
+try {
+  const projectFolder = new URL('./test/project/', import.meta.url);
+  const createDir = await mkdir(path, { recursive: true });
+
+  console.log(`created ${createDir}`);
+} catch (err) {
+  console.error(err.message);
+}
+```
+
+```cjs
+const { mkdir } = require('node:fs/promises');
+const { resolve, join } = require('node:path');
+
+async function makeDirectory() {
+  const projectFolder = join(__dirname, 'test', 'project');
+  const dirCreation = await mkdir(projectFolder, { recursive: true });
+
+  console.log(dirCreation);
+  return dirCreation;
+}
+
+makeDirectory().catch(console.error);
+```
+
 ### `fsPromises.mkdtemp(prefix[, options])`
 
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