add Object "File"
- add `read` : read file
- add `read_json` : read json format
- add `write` : save file
- add `write_json` : save json format
- add `overwrite` : overwrite file
- add `overwrite_json` : overwrite json format
- add `appendwrtie` : appendwrtie file
- add `appendwrtie_json` : appendwrtie json format
- add `clear` : remove cache
- add `remove` : remove file