feat: 문자열에서 한글을 추출해주는 extractHangul 함수를 제거합니다

[okinawaa]

Overview

https://github.com/toss/es-hangul/discussions/176 에서 논의한 결과 extrachHangul은 한글의 원리를 해결하는것이 아닌, 자바스크립트 일반 메서드로도 해결이 가능하므로 es-hangul에서 제공해주지 않아도 된다고 생각합니다.

isHangul 함수만 제공해서 [..."가a나b"].filter(isHangul).join('')처럼 사용하게 하는 것이 더 나은 인터페이스라고 생각해요.

PR Checklist

• [x] I read and included theses actions below

1. I have read the Contributing Guide
2. I have written documents and tests, if needed.

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Name	Status	Preview	Comments	Updated (UTC)
es-hangul	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 12, 2024 3:34pm

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (587fb04) to head (2bce1b3).

Additional details and impacted files

[](https://app.codecov.io/gh/toss/es-hangul/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toss) ```diff @@ Coverage Diff @@ ## v2 #186 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 16 15 -1 Lines 260 273 +13 Branches 58 66 +8 ========================================= + Hits 260 273 +13 ```