In preparation of FTUE changes... (#2556)

* Remove the welcome screen

* Allow the UserSessionFlowCoordinator to control the whole app hierarchy, not only its splitView

* Start using the new verification state listener

* Rename Onboarding to AuthenticationStart in preparation for the new OnboardingFlowCoordinator; update snapshots and tests

* Make the AuthenticationCoordinator a proper FlowCoordinator

* Add some padding around the authentication start screen report a problem button

* Bump the RustSDK to v1.1.49

* Only add bottom padding on the authentication start screen report a problem button

ElementX/Sources/Screens/RoomRolesAndPermissionsScreen/RoomRolesAndPermissionsScreenViewModel.swift

@@ -100,9 +100,9 @@ class RoomRolesAndPermissionsScreenViewModel: RoomRolesAndPermissionsScreenViewM
         showSavingIndicator()
         
         switch await roomProxy.resetPowerLevels() {
-        case .success(let success):
+        case .success:
             showSuccessIndicator()
-        case .failure(let failure):
+        case .failure:
             state.bindings.alertInfo = AlertInfo(id: .error)
         }