start frontier based exploration
folder struct for frontier based exploration : done
calculate points on frontiers, store them in global array : success
display frontiers along with node movement in a new window simultaneously
implemented whole Frontier-based Exploration by choosing the Frontiers randomly : success (kinda) - FIX IT : rand() generates the same number => destination : all nodes follow the same frontier
add Frontier based on random choice as sample code to examples/ folder - FIX IT: i should rename the examples folder to samples