Add content resizing sample (#2756)

Add a content resizing sample for iOS to support
https://github.com/flutter/flutter/pull/177410

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I have added sample code updates to the [changelog].
- [x] I updated/added relevant documentation (doc comments with `///`).

If you need help, consider asking for advice on the #hackers-devrel
channel on [Discord].

<!-- Links -->
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md
[CLA]: https://cla.developers.google.com/
[Discord]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md
[Contributors Guide]:
https://github.com/flutter/samples/blob/main/CONTRIBUTING.md
[changelog]: ../CHANGELOG.md

---------

Co-authored-by: Eric Windmill <eric@ericwindmill.com>

add_to_app/ios_content_resizing/flutter_module/lib/main.dart

@@ -0,0 +1,52 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+
+void main() {
+  runApp(const ResizeApp());
+}
+
+class ResizeApp extends StatefulWidget {
+  const ResizeApp({super.key});
+
+  @override
+  State<ResizeApp> createState() => _ResizeAppState();
+}
+
+class _ResizeAppState extends State<ResizeApp> {
+  int _listSize = 1;
+  void _addToList() {
+    setState(() {
+      _listSize++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      heightFactor: 1,
+      child: Directionality(
+        textDirection: TextDirection.ltr,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: <Widget>[
+            for (int i = 0; i < _listSize; i++)
+              Container(color: HSVColor.fromAHSV(1, (10.0 * i), 1, 1).toColor(), height: 50, width: 200,
+                child: Center(
+                  child: Text(
+                    'Flutter Widget $i',
+                    style: const TextStyle(fontSize: 16, color: Colors.black),
+                  ),
+                )),
+            TextButton(
+              onPressed: _addToList,
+              child: Text('Listception!'),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}