Login with QR UI components (#6790)

* Display QR button on login screen if HS supports

* Create start screen

* Add build flag

* Connect start screen to the login

* QR display screen

* Move `LabelledDividerView` into separate file

* Show display QR screen on button tap

* Add swift concurreny to CameraAccessManager

* Introduce `QRLoginServiceProtocol`

* Use new service in screens

* Introduce scan QR code screen

* Remove hardcoded service availability

* Remove unnecessary import

* Add confirmation screen

* Add loading screen

* Fix ZXingObjc targets

* Add failure screen

* Add strings

* Various UI tweaks, navigation according to the service state

* Fix tests

* Add string for invalid QR error

* Add QR login service mode

RiotSwiftUI/Modules/Authentication/Common/Service/MatrixSDK/AuthenticationService.swift

@@ -259,10 +259,14 @@ class AuthenticationService: NSObject {
         }
         
         let loginFlow = try await getLoginFlowResult(client: client)
+
+        let supportsQRLogin = try await QRLoginService(client: client,
+                                                       mode: .notAuthenticated).isServiceAvailable()
         
         let homeserver = AuthenticationState.Homeserver(address: loginFlow.homeserverAddress,
                                                         addressFromUser: homeserverAddress,
-                                                        preferredLoginMode: loginFlow.loginMode)
+                                                        preferredLoginMode: loginFlow.loginMode,
+                                                        supportsQRLogin: supportsQRLogin)
         return (client, homeserver)
     }