add command execution log

src/main/java/cc/fascinated/bat/service/CommandService.java

@@ -148,6 +148,7 @@ public class CommandService extends ListenerAdapter {
                     return;
                 }
             }
+            log.info("Executing command \"{}\" for user \"{}\"", commandName, user.getDiscordUser().getName());
             executor.execute(guild, user, ranInsideGuild ? event.getChannel().asTextChannel() : event.getChannel().asPrivateChannel(),
                     event.getMember(), event.getInteraction());
         } catch (Exception ex) {