MSG Swift 스타일 가이드 1.0.0

Swift Style Guide

일관성있는 Swift 코드를 위한 Style Guide입니다.

What's Changed

• Create LICENSE by @baekteun in #1

New Contributors

• @baekteun made their first contribution in #1

Full Changelog: https://github.com/GSM-MSG/MSG-Swift-Style-Guide/commits/1.0.0