doc-guide: add help documentation checktransupdate.rst

This commit adds help documents - doc-guide/checktransupdate.rst
and zh_CN/doc-guide/checktransupdate.rst for scripts/checktransupdate.py
, including English and Chinese versions

Signed-off-by: Dongliang Mu <[e-mail]>
Reviewed-by: Yanteng Si <[e-mail]>
[jc: fixed missing title problem in the new file]
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/doc-guide/checktransupdate.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+Checking for needed translation updates
+=======================================
+
+This script helps track the translation status of the documentation in
+different locales, i.e., whether the documentation is up-to-date with
+the English counterpart.
+
+How it works
+------------
+
+It uses ``git log`` command to track the latest English commit from the
+translation commit (order by author date) and the latest English commits
+from HEAD. If any differences occur, the file is considered as out-of-date,
+then commits that need to be updated will be collected and reported.
+
+Features implemented
+
+-  check all files in a certain locale
+-  check a single file or a set of files
+-  provide options to change output format
+-  track the translation status of files that have no translation
+
+Usage
+-----
+
+::
+
+   ./scripts/checktransupdate.py --help
+
+Please refer to the output of argument parser for usage details.
+
+Samples
+
+-  ``./scripts/checktransupdate.py -l zh_CN``
+   This will print all the files that need to be updated in the zh_CN locale.
+-  ``./scripts/checktransupdate.py Documentation/translations/zh_CN/dev-tools/testing-overview.rst``
+   This will only print the status of the specified file.
+
+Then the output is something like:
+
+::
+
+    Documentation/dev-tools/kfence.rst
+    No translation in the locale of zh_CN
+
+    Documentation/translations/zh_CN/dev-tools/testing-overview.rst
+    commit 42fb9cfd5b18 ("Documentation: dev-tools: Add link to RV docs")
+    1 commits needs resolving in total
+
+Features to be implemented
+
+- files can be a folder instead of only a file

Documentation/doc-guide/index.rst

···
    parse-headers
    contributing
    maintainer-profile
+   checktransupdate
 
 .. only::  subproject and html
 

Documentation/translations/zh_CN/doc-guide/checktransupdate.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/doc-guide/checktransupdate.rst
+
+:译者: 慕冬亮 Dongliang Mu <[e-mail]>
+
+检查翻译更新
+
+这个脚本帮助跟踪不同语言的文档翻译状态，即文档是否与对应的英文版本保持更新。
+
+工作原理
+------------
+
+它使用 ``git log`` 命令来跟踪翻译提交的最新英文提交（按作者日期排序）和英文文档的
+最新提交。如果有任何差异，则该文件被认为是过期的，然后需要更新的提交将被收集并报告。
+
+实现的功能
+
+- 检查特定语言中的所有文件
+- 检查单个文件或一组文件
+- 提供更改输出格式的选项
+- 跟踪没有翻译过的文件的翻译状态
+
+用法
+-----
+
+::
+
+    ./scripts/checktransupdate.py --help
+
+具体用法请参考参数解析器的输出
+
+示例
+
+-  ``./scripts/checktransupdate.py -l zh_CN``
+   这将打印 zh_CN 语言中需要更新的所有文件。
+-  ``./scripts/checktransupdate.py Documentation/translations/zh_CN/dev-tools/testing-overview.rst``
+   这将只打印指定文件的状态。
+
+然后输出类似如下的内容：
+
+::
+
+    Documentation/dev-tools/kfence.rst
+    No translation in the locale of zh_CN
+
+    Documentation/translations/zh_CN/dev-tools/testing-overview.rst
+    commit 42fb9cfd5b18 ("Documentation: dev-tools: Add link to RV docs")
+    1 commits needs resolving in total
+
+待实现的功能
+
+- 文件参数可以是文件夹而不仅仅是单个文件

Documentation/translations/zh_CN/doc-guide/index.rst

···
    parse-headers
    contributing
    maintainer-profile
+   checktransupdate
 
 .. only::  subproject and html