input: Write a function to parse a JSON string and return a list of key-value pairs formatted as "key: value".
  assert parse_json('{"name": "John", "age": 30, "city": "New York"}') == ['name: John', 'age: 30', 'city: New York']
  assert parse_json('{"brand": "Ford", "model": "Mustang", "year": 1964}') == ['brand: Ford', 'model: Mustang', 'year: 1964']
  assert parse_json('{"a": 1, "b": 2, "c": 3}') == ['a: 1', 'b: 2', 'c: 3']
output: import json
  
  def parse_json(json_string):
      data = json.loads(json_string)
      return [f"{key}: {value}" for key, value in data.items()]