Cupertino gallery app (#2715)

Resolves #2519 

Part of the larger effort to bring the samples/repo into a stable and
maintainable condition that _also_ remains useful. See: #2409

## 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 `///`).

cupertino_gallery/lib/widgets/list_tile_page.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/cupertino.dart';
+
+class ListTilePage extends StatelessWidget {
+  const ListTilePage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: const CupertinoNavigationBar(middle: Text('List Tile')),
+      child: Center(
+        child: ListView(
+          children: [
+            CupertinoListSection.insetGrouped(
+              children: [
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.info),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.person),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.wifi),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+              ],
+            ),
+            CupertinoListSection(
+              children: [
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.search),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.heart_fill),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+                CupertinoListTile(
+                  title: Text('Title'),
+                  subtitle: Text('Subtitle'),
+                  leading: Icon(CupertinoIcons.ant),
+                  trailing: Icon(CupertinoIcons.forward),
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}