Fixes #734 - Add a "View logs" option to the report a problem screen

Move bug report and log viewer responsibility to a separate flow coordinator. Reuse it as a child coordinator in the authentication, userSessionFlow and settings flow coordinators.

ElementX/Sources/Screens/BugReportScreen/BugReportScreenModels.swift

@@ -19,6 +19,7 @@ import UIKit
 
 enum BugReportScreenViewModelAction {
     case cancel
+    case viewLogs
     case submitStarted(progressPublisher: CurrentValuePublisher<Double, Never>)
     case submitFinished
     case submitFailed(error: Error)
@@ -42,4 +43,5 @@ enum BugReportScreenViewAction {
     case submit
     case removeScreenshot
     case attachScreenshot(UIImage)
+    case viewLogs
 }