[CHANGE] Reworked ExtendedBackgroundService.cs with State logic and actions

Manager.App/Services/System/SettingsService.cs

@@ -0,0 +1,16 @@
+namespace Manager.App.Services.System;
+
+public class SettingsService(ILogger<SettingsService> logger) : ExtendedBackgroundService(nameof(SettingsService), "Service for handling application settings.", logger, TimeSpan.FromMinutes(10))
+{
+    protected override async Task InitializeAsync(CancellationToken stoppingToken)
+    {
+        AddActions([
+            new ServiceAction("Save settings", "Save the application settings to the database", () => { }, () => true)
+            ]);
+    }
+
+    protected override async Task ExecuteServiceAsync(CancellationToken stoppingToken)
+    {
+        
+    }
+}