🌐 Sync Translations + Update README Progress Table (#3446)

### 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_zh_CN.properties

@@ -364,6 +364,9 @@ home.compressPdfs.title=压缩
 home.compressPdfs.desc=压缩 PDF 文件以减小文件大小。
 compressPdfs.tags=压缩、小、微小
 
+home.unlockPDFForms.title=Unlock PDF Forms
+home.unlockPDFForms.desc=Remove read-only property of form fields in a PDF document.
+unlockPDFForms.tags=remove,delete,form,field,readonly
 
 home.changeMetadata.title=更改元数据
 home.changeMetadata.desc=更改/删除/添加 PDF 文档的元数据。
@@ -377,7 +380,6 @@ home.ocr.title=运行 OCR /清理扫描
 home.ocr.desc=清理和识别 PDF 中的图像文本，并将其转换为可编辑文本。
 ocr.tags=识别、文本、图像、扫描、阅读、识别、检测、可编辑
 
-
 home.extractImages.title=提取图像
 home.extractImages.desc=从 PDF 中提取所有图像并保存到压缩包中。
 extractImages.tags=图片、照片、保存、归档、压缩包、截取、抓取
@@ -607,6 +609,7 @@ login.userIsDisabled=用户被禁用，登录已被阻止。请联系管理员
 login.alreadyLoggedIn=您已经登录到了
 login.alreadyLoggedIn2=设备，请注销设备后重试。
 login.toManySessions=你已经有太多的会话了。请注销一些设备后重试。
+login.logoutMessage=You have been logged out.
 
 #auto-redact
 autoRedact.title=自动删除
@@ -1193,6 +1196,10 @@ changeMetadata.selectText.4=其他元数据：
 changeMetadata.selectText.5=添加自定义元数据条目
 changeMetadata.submit=更改
 
+#unlockPDFForms
+unlockPDFForms.title=Remove Read-Only from Form Fields
+unlockPDFForms.header=Unlock PDF Forms
+unlockPDFForms.submit=Remove
 
 #pdfToPDFA
 pdfToPDFA.title=PDF 转 PDF/A
@@ -1430,9 +1437,3 @@ cookieBanner.preferencesModal.necessary.description=These cookies are essential
 cookieBanner.preferencesModal.analytics.title=Analytics
 cookieBanner.preferencesModal.analytics.description=These cookies help us understand how our tools are being used, so we can focus on building the features our community values most. Rest assured—Stirling PDF cannot and will never track the content of the documents you work with.
 
-home.unlockPDFForms.title=Unlock PDF Forms
-home.unlockPDFForms.desc=Remove read-only property of form fields in a PDF document.
-unlockPDFForms.tags=remove,delete,form,field,readonly
-unlockPDFForms.title=Remove Read-Only from Form Fields
-unlockPDFForms.header=Unlock PDF Forms
-unlockPDFForms.submit=Remove