input: Write a function to design a Python class named IntList to store integer values. The class should support adding a value to the list and finding the minimum value in the list. If the list is empty, raise a ValueError with the message "List is empty".
  assert IntList().find_min()
  assert IntList().add_value(5).find_min()==5
  assert IntList().add_value(3).add_value(2).find_min()==2
  assert IntList().add_value(7).add_value(1).add_value(4).find_min()==1
  assert IntList().add_value(10).add_value(6).add_value(8).find_min()==6
output: class IntList:
      def __init__(self):
          self.values = []
      
      def add_value(self, value):
          self.values.append(value)
          return self
      
      def find_min(self):
          if not self.values:
              raise ValueError("List is empty")
          return min(self.values)