Set up employee management codebase

<SRS>SRS02 : Employee Management </SRS>

<Changes>
- Renamed EmployeeManagememtService to EmployeeManagementService
- Added basic employee management service structure
- Connected employee management into controller and datastore
- Updated project config files
- Added auto ID generation across models
- Added payroll-related config constants
</Changes>

<Review>
Smitha Mohan
</Review>

Trenser.Zenvy/Trenser.Zenvy/services/PayslipManagementService.h

@@ -1,5 +1,9 @@
 #pragma once
+
 class PayslipManagementService
 {
+private:
+	DataStore& m_dataStore;
+public:
+	PayslipManagementService() : m_dataStore(DataStore::getInstance()) {};
 };
-