Add Types to simplify the SPM build process (#51847)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51847

This change introduces a types.js to add some useful flow types to build React Native with Swift PM.

## Changelog:
[Internal] -

Reviewed By: cortinico

Differential Revision: D76045454

fbshipit-source-id: 352e9f1a2845106c49461c3ac66188f49b520eb3

packages/react-native/scripts/ios-prebuild/types.js

@@ -0,0 +1,23 @@
+/**
+ * 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
+ */
+
+/*::
+export type Platform =
+  'ios' |
+  'ios-simulator' |
+  'mac-catalyst';
+
+export type Destination =
+  'iOS' |
+  'iOS Simulator' |
+  'macOS,variant=Mac Catalyst';
+*/
+
+module.exports = {};