input: Write a python function to generate a list of Fibonacci numbers.
  assert generate_fibonacci_list(10) == [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
  assert generate_fibonacci_list(5) == [0, 1, 1, 2, 3]
  assert generate_fibonacci_list(1) == [0]
output: def generate_fibonacci_list(n):
      if n <= 0:
          return []
      if n == 1:
          return [0]
      
      fib_list = [0, 1]
      while len(fib_list) < n:
          fib_list.append(fib_list[-1] + fib_list[-2])
      return fib_list