Add authentication flow, UI menu routing, and application config

<UserStory>AUTH001 : Login </UserStory>

<Changes>
- Introduced ApplicationConfig for default configuration values
- Implemented authentication flow in AuthenticationManagementService
- Added login and logout handling in ZenvyController
- Updated enums to include INVALID values and TEAM employee type
- Implemented login UI flow with role-based menu routing
</Changes>

<Review>
Smitha Mohan
</Review>

Trenser.Zenvy/Trenser.Zenvy/services/AuthenticationManagementService.h

@@ -3,6 +3,7 @@
 #include <map>
 #include <utility>
 #include "DataStore.h"
+#include "Enums.h"
 
 class AuthenticationManagementService
 {
@@ -10,6 +11,7 @@ private:
 	DataStore& m_dataStore;
 public:
 	AuthenticationManagementService() : m_dataStore(DataStore::getInstance()) {};
+	std::tuple<Enums::LoginStatus, Enums::EmployeeType, Enums::EmployeeDesignation> login(const std::string& username, const std::string& password);
 	void logout();
 	void changePassword();
 };