Added
- Initial release of the NHN Cloud SMS library
- Added `NHNCloudSMS` class with methods:
- `send_sms(recipient_number, message)`
- `send_bulk_sms(recipient_numbers, message)`
- `schedule_sms(recipient_number, message, schedule_time)`
- `get_sms_status(request_id)`
- `get_sent_sms_list(start_date, end_date)`
- Added `.env` file support for SMS library
- Environment variables: `NHN_CLOUD_SMS_APP_KEY`, `NHN_CLOUD_SMS_SECRET_KEY`, `NHN_CLOUD_SMS_SENDER`
- Comprehensive test coverage with `unittest` and support for mocking API calls using `unittest.mock`
Changed
- None
Fixed
- None