Add email verification screen (#6125)

Make a reusable onboarding icon view.
Use a native TextField for better dynamic type support.
Rename completion to callback.
Add readableFrame modifier.

RiotSwiftUI/Modules/Common/Mock/MockAppScreens.swift

@@ -21,6 +21,7 @@ import Foundation
 enum MockAppScreens {
     static let appScreens: [MockScreenState.Type] = [
         MockLiveLocationSharingViewerScreenState.self,
+        MockAuthenticationVerifyEmailScreenState.self,
         MockAuthenticationRegistrationScreenState.self,
         MockAuthenticationServerSelectionScreenState.self,
         MockOnboardingCelebrationScreenState.self,