Add privacy manifest and codesign Swift Package if needed

See the details from Apple: https://developer.apple.com/documentation/bundleresources/privacy_manifest_files.

We are additionally involving an XCFramework which has sparse details available. This article looks helpful: https://rhonabwy.com/2024/02/18/embedding-a-privacy-manifest-into-an-xcframework/ for a helpful article.

Not sure if we will be required to do this soon, but dropping this here for research notes.