Implement Remove Service for admin

<UserStory> SER003: Remove Service </UserStory>

<Changes>
    1. Added integration between Controller and ServiceManagementService to support service removal.
    2. Implemented ServiceManagementService::removeService with validation for service existence and marking as INACTIVE.
    3. Enhanced Controller::getServices to return a read-only map of services for safe UI access.
    4. Added AdminMenu::selectServicesToRemove helper to list active services in tabular format and capture user choice.
    5. Updated AdminMenu::removeService to prompt for service selection, delegate removal to Controller, and display success/failure messages.
</Changes>

<Test>

 Acceptance Criteria:
 1. Admin selects service ID.
 2. System confirms deletion.
 3. Service removed from customer menu.

  Precondition:
  1. Admin is logged into the system.
  2. At least one active service exists in the datastore.
  3. Customer menu displays available services.

  Steps:
  1. Navigate to Admin menu and choose "Remove Service".
    - Verify that the system lists active services in tabular format.
  2. Select a service ID from the list.
    - Verify that the system confirms deletion.
  3. Check customer menu.
    - Verify that the removed service no longer appears.
</Test>

<Review>
Sreeja Reghukumar, please review
</Review>

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/ServiceManagementService.cpp

@@ -1 +1,21 @@
 #include "ServiceManagementService.h"
+#include "Service.h"
+#include "Enums.h"
+
+util::Map<std::string, Service*> ServiceManagementService::getServices()
+{
+	return m_dataStore.getServices();
+}
+
+void ServiceManagementService::removeService(const std::string& serviceID)
+{
+	util::Map<std::string, Service*> currentServices = getServices();
+	if (currentServices.find(serviceID) != -1)
+	{
+		currentServices.getValueAt(currentServices.find(serviceID))->setState(util::State::INACTIVE);
+	}
+	else
+	{
+		throw std::runtime_error("Service not found.");
+	}
+}