add a check for is cancellable in event serhelp

Author: Elektryk-Andrzej

Code/Plugin/Commands/HelpSystem/DocsProvider.cs

@@ -1,6 +1,7 @@
 using System.Reflection;
 using System.Text;
 using CommandSystem;
+using LabApi.Events.Arguments.Interfaces;
 using SER.Code.ContextSystem.BaseContexts;
 using SER.Code.ContextSystem.Interfaces;
 using SER.Code.Exceptions;
@@ -291,6 +292,7 @@ public static string GetFlagInfo(string flagName)
     public static string GetEventInfo(EventInfo ev)
     {
         var variables = EventSystem.EventHandler.GetMimicVariables(ev);
+        var cancellable = typeof(ICancellableEvent).IsAssignableFrom(ev.EventHandlerType.GetGenericArguments().FirstOrDefault());
         var msg = variables.Count > 0 
             ? variables.Aggregate(
                 "This event has the following variables attached to it:\n", 
@@ -302,6 +304,8 @@ public static string GetEventInfo(EventInfo ev)
              $"""
               Event {ev.Name} is a part of {ev.DeclaringType?.Name ?? "unknown event group"}.
               
+              Is cancellable? {cancellable}
+              
               {msg}
               """;
     }