Restructure solution layout by module

src/PacksRegistry/StellaOps.PacksRegistry/StellaOps.PacksRegistry.Worker/Program.cs

@@ -0,0 +1,7 @@
+using StellaOps.PacksRegistry.Worker;
+
+var builder = Host.CreateApplicationBuilder(args);
+builder.Services.AddHostedService<Worker>();
+
+var host = builder.Build();
+host.Run();