perf(commanddata): take commandName directly instead of re-parsing FullCommand

Constructor previously rebuilt CommandName from FullCommand via substring + Split, allocating on every command invocation despite the caller already holding a clean commandName. Pass it through directly.

CommandHook/ChatCommandApiPatch.cs

@@ -25,7 +25,7 @@ public static class ChatCommandApiPatch
             return true;
 
         var sender = args.Caller.Player as IServerPlayer;
-        var data = new CommandData(sender, "/" + commandName);
+        var data = new CommandData(sender, commandName, "/" + commandName);
 
         if (system.FireBefore(commandName, ref data))
         {

CommandHook/CommandData.cs

@@ -19,11 +19,11 @@ public struct CommandData
         set => flags = value ? (byte)(flags | FlagCancel) : (byte)(flags & ~FlagCancel);
     }
 
-    public CommandData(IServerPlayer? sender, string fullCommand)
+    public CommandData(IServerPlayer? sender, string commandName, string fullCommand)
     {
         Sender = sender;
-        FullCommand = fullCommand.Length > 0 ? fullCommand.Trim() : string.Empty;
+        CommandName = commandName;
-        CommandName = FullCommand.Length > 1 ? FullCommand[1..].Split(' ')[0] : string.Empty;
+        FullCommand = fullCommand;
         flags = sender != null ? FlagIsPlayerCommand : (byte)0;
     }
 }