input: Write a python function to return a JSON structure representing the current state of the files present in the working directory.
  assert 'hash' in genStatusJson()['example.py']
  assert 'created_time' in genStatusJson()['example.py']
  assert isinstance(genStatusJson(), dict)
output: def genStatusJson():
      import os
      import hashlib
      import json
      from datetime import datetime
  
      def file_hash(filepath):
          hasher = hashlib.md5()
          with open(filepath, 'rb') as f:
              buf = f.read()
              hasher.update(buf)
          return hasher.hexdigest()
  
      def file_created_time(filepath):
          return datetime.fromtimestamp(os.path.getctime(filepath)).isoformat()
  
      files_status = {}
      for filename in os.listdir('.'):
          if os.path.isfile(filename):
              files_status[filename] = {
                  'hash': file_hash(filename),
                  'created_time': file_created_time(filename)
              }
  
      return files_status