com.apple.GenerativePlaygroundUI.remoteUI EXPresentsUserInterface EXExtensionPointIsPublic EXSupportedPlatforms iOS macOS macCatalyst xrOS EXRequiredEntitlements EXTCCPolicy prompt-host-personality com.apple.ImagePlayground.NonUIExtension EXPresentsUserInterface EXExtensionPointIsPublic EXSupportsCatalyst EXRequiredEntitlements EXTCCPolicy prompt-host-personality