Write code to identify if people are standing in a line and if people are standing in a circle. This should be a standalone node that takes in a People message $($like from the leg$\_($d$)$etector node$)$ and updates the name string to prepend the person name with the group name $($i$.$e$.,$ person$\_(1)$ would become circle$\_(1)\_($p$)$erson$\_(1)$ or line$\_(1)\_($p$)$erson$\_(1)).$ This new topic should be published on a topic: $()/($robo$)($t$\_(0))/($d$)$etected$\_($g$)$roups please