input: Write a python function to deep copy a dictionary.
  assert deep_copy_dictionary({"name": "John", "age": 28}) == {"name": "John", "age": 28}
  assert deep_copy_dictionary({"city": "New York", "population": 8419000}) == {"city": "New York", "population": 8419000}
  assert deep_copy_dictionary({"fruits": ["apple", "banana"], "vegetables": ["carrot", "lettuce"]}) == {"fruits": ["apple", "banana"], "vegetables": ["carrot", "lettuce"]}
output: def deep_copy_dictionary(original_dict):
      import copy
      return copy.deepcopy(original_dict)