Time for action – setting up the EnemyManager class

1. Add the setUpWaypoints() helper function to the EnemyManager class:

   Private Sub setUpWaypoints()
       Dim path0 As List(Of Vector2) = new List(Of Vector2)()
       path0.Add(new Vector2(850, 300))
       path0.Add(new Vector2(-100, 300))
       pathWaypoints.Add(path0)
       waveSpawns(0) = 0
   
       Dim path1 As List(Of Vector2) = new List(Of Vector2)()
       path1.Add(new Vector2(-50, 225))
       path1.Add(new Vector2(850, 225))
       pathWaypoints.Add(path1)
       waveSpawns(1) = 0
   
       Dim path2 As List(Of Vector2) = new List(Of Vector2)()
       path2.Add(new Vector2(-100, 50))
       path2.Add(new Vector2(150, 50))
       path2.Add(new Vector2(200, 75))
       path2.Add(new Vector2(200, 125))
       path2.Add(new Vector2(150, 150))
       path2.Add(new Vector2(150, 175))
       path2.Add(new Vector2(200, 200))
       path2.Add(new Vector2(600, 200))
       path2.Add(new Vector2(850, 600))
       pathWaypoints.Add(path2)
       waveSpawns(2) = 0
   
       Dim path3 As List(Of Vector2) = new List...