feat: add config option to run silently (no logs, no commands, but doing everything else needed for logging)

Catalogger.Backend/Config.cs

@@ -57,6 +57,9 @@ public class Config
 
         public string? SupportGuild { get; init; }
         public bool EnableDash { get; init; } = false;
+
+        // If enabled, nothing will be logged.
+        public bool TestMode { get; init; } = false;
     }
 
     public class WebConfig