Move build-types config into own module (#50450)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/50450

Intends to be reused by the incoming `buildApiSnapshot` behaviour.

Changelog: [Internal]

Reviewed By: iwoplaza

Differential Revision: D72306509

fbshipit-source-id: 9e03c95f2469e10c05bdd0be39d4e217a6cc197f

scripts/build-types/config.js

@@ -0,0 +1,37 @@
+/**
+ * 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
+ * @oncall react_native
+ */
+
+/**
+ * The root entry point for type generation (main entry point for the
+ * react-native package).
+ */
+const ENTRY_POINT = 'packages/react-native/index.js.flow';
+
+/**
+ * Ignore patterns for source files that should not be considered for
+ * translation.
+ */
+const IGNORE_PATTERNS = [
+  '**/__{tests,mocks,fixtures,flowtests}__/**',
+  '**/*.{macos,windows}.js',
+];
+
+/**
+ * The output directory name for generated type definitions in each translated
+ * package.
+ */
+const TYPES_OUTPUT_DIR = 'types_generated';
+
+module.exports = {
+  ENTRY_POINT,
+  IGNORE_PATTERNS,
+  TYPES_OUTPUT_DIR,
+};