🌐 [i18n-KO] Translated text_generation.md to Korean (#33777)

* docs: ko: text_generation.md

* feat: nmt draft

* fix: manual edits

* fix: manual edits

* fix: resolve suggestions

Co-authored-by: Chulhwa (Evan) Han <cjfghk5697@ajou.ac.kr>

---------

Co-authored-by: Chulhwa (Evan) Han <cjfghk5697@ajou.ac.kr>
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

docs/source/ko/_toctree.yml

@@ -288,8 +288,8 @@
       title: 로깅
     - local: main_classes/model
       title: Models
-    - local: in_translation
-      title: (번역중) Text Generation
+    - local: main_classes/text_generation
+      title: 텍스트 생성
     - local: main_classes/onnx
       title: ONNX
     - local: in_translation