🌐 [i18n-KO] Translated image_to_image.md to Korean (#32327)

* docs: ko: tasks/image_to_image.md

* feat: nmt draft

* fix: manual edits

* fix: resolve suggestions

Co-authored-by: Jihun Lim <31366038+heuristicwave@users.noreply.github.com>
Co-authored-by: Jiwook Han <33192762+mreraser@users.noreply.github.com>

* fix: handle remaining suggestions

Co-authored-by: Jiwook Han <33192762+mreraser@users.noreply.github.com>

---------

Co-authored-by: Jihun Lim <31366038+heuristicwave@users.noreply.github.com>
Co-authored-by: Jiwook Han <33192762+mreraser@users.noreply.github.com>

docs/source/ko/_toctree.yml

@@ -73,8 +73,8 @@
         title: 제로샷(zero-shot) 이미지 분류
       - local: tasks/monocular_depth_estimation
         title: 단일 영상 기반 깊이 추정
-      - local: in_translation
-        title: (번역중) Image-to-Image
+      - local: tasks/image_to_image
+        title: Image-to-Image
       - local: in_translation
         title: (번역중) Image Feature Extraction
       - local: tasks/mask_generation