Add -testplugin commandline switch

Torch.Server/TorchConfig.cs

@@ -117,6 +117,10 @@ namespace Torch.Server
         [Arg("console", "Keeps a separate console window open after the main UI loads.")]
         public bool IndependentConsole { get; set; } = false;
 
+        [XmlIgnore]
+        [Arg("testplugin", "Path to a plugin to debug. For development use only.")]
+        public string TestPlugin { get; set; }
+
         [XmlIgnore]
         private string _path;