Release v1.2.1

What's Changed

• [Feat] Separate UI and Business Logic by @binary-ho in #13
• refactor: replace created memo toast to dialog ㅜㅜ by @binary-ho in #14
• [Feat] 에디터 폰트 이쁜(?) 폰트로 변경 by @binary-ho in #15
• [Feat] move dialog center of the memo window by @binary-ho in #16
• [Feat] Flip Delete Note Dialog's button (Flit Yes Or No)
• 버전 22.3 지원

Full Changelog: v1.1.2...v1.2.1