add security briefing

enzevalos_iphone.xcodeproj/project.pbxproj

enzevalos_iphone/Dialog/DialogOption.swift

enzevalos_iphone/PersistentMail +CoreDataProperties.swift

enzevalos_iphone/SwiftUI/Data/DisplayProtocols.swift

enzevalos_iphone/SwiftUI/Data/SimulatorData.swift

enzevalos_iphone/SwiftUI/Read/ReadMainView.swift

...os_iphone/SwiftUI/Read/Tabbed Views/MessageViewMain.swift

...hone/SwiftUI/Read/Tabbed Views/SecurityBriefingView.swift

...los_iphone/SwiftUI/Read/Tabbed Views/SenderViewMain.swift

enzevalos_iphone/en.lproj/Localizable.strings