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/models/HRManager.h

@@ -3,5 +3,16 @@
 
 class HRManager : public Employee
 {
+    HRManager() = default;
+    HRManager(
+        const std::string& password,
+        const std::string& name,
+        const std::string& phone,
+        const std::string& email,
+        const std::string& teamId,
+        std::shared_ptr<Payroll> payroll
+    ) :Employee(password, name, phone, email, teamId, Enums::EmployeeType::GENERAL, payroll) {
+    };
+    ~HRManager() = default;
 };