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

RiotTests/Modules/Authentication/Mocks/MockAuthenticationRestClient.swift

@@ -208,4 +208,10 @@ class MockAuthenticationRestClient: AuthenticationRestClient {
     func resetPassword(parameters: [String : Any]) async throws {
         throw MockError.unhandled
     }
+
+    // MARK: Versions
+
+    func supportedMatrixVersions() async throws -> MXMatrixVersions {
+        throw MockError.unhandled
+    }
 }