refactor: replace size() == 0 with isEmpty()

src/main/java/emu/grasscutter/command/commands/TalentCommand.java

@@ -27,7 +27,7 @@ public final class TalentCommand implements CommandHandler {
 
     @Override
     public void execute(Player sender, Player targetPlayer, List<String> args) {
-        if (args.size() < 1) {
+        if (args.isEmpty()) {
             sendUsageMessage(sender);
             return;
         }