🌐 [i18n-KO] Translated feature_extractors.md to Korea
Author: ssum21
Pull request: yes

# What does this PR do?

Translated the `feature_extractors.md` file of the documentation to Korean.
Thank you in advance for your review.

Part of https://github.com/huggingface/transformers/issues/20179

## Before reviewing
- [x] Check for missing / redundant translations (번역 누락/중복 검사)
- [x] Grammar Check (맞춤법 검사)
- [x] Review or Add new terms to glossary (용어 확인 및 추가)
- [x] Check Inline TOC (e.g. `[[lowercased-header]]`)
- [x] Check live-preview for gotchas (live-preview로 정상작동 확인)

## Who can review? (Initial)

May you please review this PR?
@4N3MONE @jungnerd @harheem @yijun-lee 

## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [x] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [x] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [x] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [x] Did you write any new necessary tests?

## Who can review? (Final)

<!-- 2. KREW 팀원들의 리뷰가 끝난 후에 아래 주석을 노출해주세요! -->
@stevhliu May you please review this PR?

Comments:
LGTM! 번역 고생하셨습니다. 🤗 

@jungnerd 제안 감사드립니다! Glossary를 계속 참고하는 습관을 들이겠습니다.
제안 사항을 수정하고 읽어보니 훨씬 가독성이 좋아졌습니다. 시간내어 코멘트 달아주셔서 감사합니다:)

번역이 매끄럽고 원문 의미를 잘 살리셨습니다. 용어 선택도 일관되어 읽기 좋았습니다. 고생 많으셨습니다! 🤗


@Kim-Ju-won 주원님 감사드립니다!! Glossary 기반으로 진행될 수 있도록 노력하겠습니다. 해당 내용에 대해서 Glossary를 간과해서 작성한게 많은 것 같습니다. 정말 제언 감사드리며 해당 커밋은 전부 확인하고 반영했습니다. 도와주셔서 감사드립니다.

@ssum21 아닙니다! 저야 말로 자연스럽게 작성하신 글을 읽으며 feature_extractor에 대해서 배웠네요 approve로 바꿔두었습니다! 수고 많으셨어요 : ) 

LGTM 👍 

Thanks again for your continued work on this! Would you mind resolving the conflict first before we merge?

@stevhliu One of our Korean Translation team members, @ssum21, has just resolved the conflicts.
When you have a moment, could you please review and approve the merge? Thank you so much! 🙏

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_39544). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

build-doc

[Building docs for all languages...](https://github.com/huggingface/transformers/actions/runs/18412266726)

Hello @stevhliu,

I've resolved the merge conflict you pointed out earlier. It seems the previous approvals were dismissed after the branch was updated.

Could you please take another look and re-approve when you have a moment? All reviews from the Korean team are complete.

Thank you!

Thanks! The doc-builder is currently having some issues with building translated docs. Currently working on a fix and I'll merge for you once the issue is resolved!

build-doc

[Building docs for all languages...](https://github.com/huggingface/transformers/actions/runs/18570437272)