Add copyright and disclaimer comments to types.mjs

Author: slekkala1

src/_shims/auto/types.mjs

@@ -1,3 +1,10 @@
+/**
+ * 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.
+ */
+
 /**
  * Disclaimer: modules in _shims aren't intended to be imported by SDK users.
  */