Bring back C++ Turbo Module example in RN Tester (facebook#55988)

Summary:
Pull Request resolved: facebook#55988

## Changelog:
[General] [Fixed] - Bring back C++ Turbo Module example in RN Tester

The `TurboCxxModuleExample` was accidentally deleted in facebook#54544 (D87082461) which removed the TurboCxxModule C++ class. The JS example file and its RN Tester registrations should have been kept since they wrap `NativeCxxModuleExampleExample` which still exists.

This restores:
- `TurboCxxModuleExample.js` example file
- RNTesterList entries for iOS, Android, macOS, and Windows

Reviewed By: shwanton

Differential Revision: D95653981

fbshipit-source-id: c8972268aaa95bc57e7f7ee9367b8b10c9d7f029

Author: christophpurrer

packages/rn-tester/js/examples/TurboModule/TurboCxxModuleExample.js

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
+const NativeCxxModuleExampleExample = require('./NativeCxxModuleExampleExample');
+const React = require('react');
+
+exports.displayName = (undefined: ?string);
+exports.title = 'Cxx TurboModule';
+exports.category = 'Basic';
+exports.description = 'Usage of Cxx TurboModule';
+exports.examples = [
+  {
+    title: 'TurboCxxModuleExample',
+    render: function (): React.MixedElement {
+      return <NativeCxxModuleExampleExample />;
+    },
+  },
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/utils/RNTesterList.android.js

@@ -374,6 +374,11 @@ const APIs: Array<RNTesterModuleInfo> = ([
     key: 'LegacyModuleExample',
     module: require('../examples/TurboModule/LegacyModuleExample'),
   },
+  {
+    key: 'TurboCxxModuleExample',
+    category: 'Basic',
+    module: require('../examples/TurboModule/TurboCxxModuleExample'),
+  },
   // Basic check to detect the availability of the IntersectionObserver API.
   // $FlowExpectedError[cannot-resolve-name]
   ...(typeof IntersectionObserver === 'function'

packages/rn-tester/js/utils/RNTesterList.ios.js

@@ -331,6 +331,10 @@ const APIs: Array<RNTesterModuleInfo> = ([
     key: 'LegacyModuleExample',
     module: require('../examples/TurboModule/LegacyModuleExample'),
   },
+  {
+    key: 'TurboCxxModuleExample',
+    module: require('../examples/TurboModule/TurboCxxModuleExample'),
+  },
   {
     key: 'VibrationExample',
     module: require('../examples/Vibration/VibrationExample'),