Exclude Internal and Private categories (#56035)

Summary:

Excludes files with `*+Internal.h` and `*+Private.h` categories from the public API `ReactApple` snapshot.

Changelog:
[Internal]

Reviewed By: cipolleschi

Differential Revision: D95953096

Author: coado

scripts/cxx-api/config.yml

@@ -60,6 +60,8 @@ ReactApple:
     - "*/platform/windows/*"
     - "*/platform/macos/*"
     - "*/platform/android/*"
+    - "*+Private.h"
+    - "*+Internal.h"
   definitions:
     __cplusplus: 1
   variants: