Checkstyle-cli

Feat

- Add utils package
- Add convert args dict to list function
- Add exit_code as return value

Fix

- Fix typo

Refactor

- Add store to utils package
- Add parser to utils package
- Add target param to run_command
- Change way to parse argv

Fix

- Resolve no module error

Refactor

- Add __init__.py to tests package

Feat

- Add tests package for testing

Refactor

- Rename main package to checkstyle

Feat

- Create checkstyle cache path
- Add download progress bar
- Add is_exist_file function
- Update run_checkstyle function
- Add download_checkstyle function
- Add version argv to arg_parser

Refactor

- Rename parse_options to parse_args