Refactor code structure for improved readability and maintainability

dotnet/src/TwitchArchive.Web/Hubs/ProcessOutputHub.cs

@@ -0,0 +1,20 @@
+using Microsoft.AspNetCore.SignalR;
+using System.Threading.Tasks;
+
+namespace TwitchArchive.Web.Hubs
+{
+    public class ProcessOutputHub : Hub
+    {
+        // methods are server-driven; clients listen on ReceiveLine
+
+        public Task JoinStreamerGroup(string streamer)
+        {
+            return Groups.AddToGroupAsync(Context.ConnectionId, streamer);
+        }
+
+        public Task LeaveStreamerGroup(string streamer)
+        {
+            return Groups.RemoveFromGroupAsync(Context.ConnectionId, streamer);
+        }
+    }
+}