- Introduction on base view model and stateless widget classes

- Implementation of firebase
- Implementation of dependency injection

Took 11 hours 26 minutes

lib/constants/constants.dart

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+const String PhoneNoViewRoute = "PhoneNo";
+const String CodeViewRoute = "Code";
+const String HomeViewRoute = "Home";
+const String UpdateDetailsViewRoute = "UpdateDetails";
+const String AddTestsViewRoute = "AddTests";
+const String TestListViewRoute = "TestList";
+const String TestOverviewViewRoute = "TestOverview";
+const String LoginViewRoute = "Login";
+
+const String HasStarted = "hasStarted";
+const String HasData = "hasData";
+const String HasError = "hasError";