scripts: add scripts/checktransupdate.py

scripts: add scripts/checktransupdate.py

The checktransupdate.py script helps track the translation status of
the documentation in different locales, e.g., zh_CN and verify if
these documenation is up-to-date. More specially, it uses `git log`
commit to find the latest english commit from the translation commit
(order by author date) and the latest english commits from HEAD. If
differences occur, report the file and commits that need to be updated.

Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Cheng Ziqiu <chengziqiu@hust.edu.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240611131723.53515-1-dzm91@hust.edu.cn