Add privacy manifest

[kitwtnb]

Apple has declared that it will reject applications and SDKs without a privacy manifest starting in the spring of 2024. SDKs that use modificationDate , contentModificationDateKey need a privacy manifest, so PrivacyInfo.xcprivacy has been added.

The following document was used as a reference for setting up the file. https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api