Key backup returns (#1951)

* Converge on UserSessionFlowCoordinator logout confirmation

* Add logout confirmation screen strings to untranslated.

* Fix chat backup learn more URl fragment.

* Implement logout flows that check recovery and key backup for the last session

* Move logout confirmation screen strings to localazy

* Change encrypted timeline item copy to "Waiting for decryption key"

* Use different encrypted history banner based on key backup states

* Introduce a SettingsFlowCoordinator and implement navigation directly to the secure backup screen from the logout flows.

* Fix **mocked** secure backup controller flows

* Simplify encrypted history banner logic

* Address PR comments

ElementX/Sources/Application/Navigation/AppRoutes.swift

@@ -24,6 +24,8 @@ enum AppRoute: Equatable {
     case roomMemberDetails(userID: String)
     case invites
     case genericCallLink(url: URL)
+    case settings
+    case chatBackupSettings
 }
 
 struct AppRouteURLParser {