Create a Pedestrian class and generate one instance on the map

[vchu22]

Need to implement these details:

• Generate the pedestrian at a random point on the island
• The pedestrian moving around the map
• The pedestrian can drop trash (will only litter one trash in its lifetime)
• Pedestrian will pick up their trash when detected being pecked by the seagull 3-4 times
• Pedestrian will walk away and disappear after picking up trash