Updated commands to remove the hide from help property, instead set the help text to null for whenever that eventually gets implemented.

Also refactored the way tasks are handled so instead of adding to an array and checking in on them next time someone sends a message, it instead delegates it to a very basic async handler that'll await the command, report errors and kill the task if it takes too long.

KfChatDotNetBot/Commands/ICommand.cs

@@ -7,9 +7,10 @@ namespace KfChatDotNetBot.Commands;
 internal interface ICommand
 {
     List<Regex> Patterns { get; }
-    string HelpText { get; }
-    bool HideFromHelp { get; }
+    // Set to null to disable help for a given command
+    string? HelpText { get; }
     UserRight RequiredRight { get; }
+    TimeSpan Timeout { get; }
 
     Task RunCommand(ChatBot botInstance, MessageModel message, UserDbModel user, GroupCollection arguments, CancellationToken ctx);
 }