🌐 Sync Translations + Update README Progress Table (#3349)

### Description of Changes

This Pull Request was automatically generated to synchronize updates to
translation files and documentation. Below are the details of the
changes made:

#### **1. Synchronization of Translation Files**
- Updated translation files (`messages_*.properties`) to reflect changes
in the reference file `messages_en_GB.properties`.
- Ensured consistency and synchronization across all supported language
files.
- Highlighted any missing or incomplete translations.

#### **2. Update README.md**
- Generated the translation progress table in `README.md`.
- Added a summary of the current translation status for all supported
languages.
- Included up-to-date statistics on translation coverage.

#### **Why these changes are necessary**
- Keeps translation files aligned with the latest reference updates.
- Ensures the documentation reflects the current translation progress.

---

Auto-generated by [create-pull-request][1].

[1]: https://github.com/peter-evans/create-pull-request

---------

Co-authored-by: stirlingbot[bot] <195170888+stirlingbot[bot]@users.noreply.github.com>

src/main/resources/messages_ko_KR.properties

@@ -10,6 +10,9 @@ multiPdfPrompt=PDF 선택 (2개 이상)
 multiPdfDropPrompt=필요한 모든 PDF를 선택(또는 끌어다 놓기)하세요
 imgPrompt=이미지 선택
 genericSubmit=제출
+uploadLimit=Maximum file size:
+uploadLimitExceededSingular=is too large. Maximum allowed size is
+uploadLimitExceededPlural=are too large. Maximum allowed size is
 processTimeWarning=경고: 이 과정은 파일 크기에 따라 최대 1분이 소요될 수 있습니다
 pageOrderPrompt=사용자 지정 페이지 순서 (쉼표로 구분된 페이지 번호 목록 또는 2n+1과 같은 함수 입력):
 pageSelectionPrompt=사용자 지정 페이지 선택 (페이지 번호 1,5,6 또는 2n+1과 같은 함수를 쉼표로 구분하여 목록 입력):