* Smoother practice experience
* update ci to check all md files
* fix some syntax
* fix README-zh_CN.md
* update syntax_lint accorging to PEP8
* Temporarily delete this question 'Explain the sidecar container pattern' to pass the workflow
---------
Co-authored-by: zhangzhen <zhangzhen@nao.cas.cn>
Co-authored-by: Arie Bregman <bregman.arie@gmail.com>
For running the newly added syntax_checker + PEP8 test
for the Python files in this project.
Also added small print to syntax_checker to indicate tests passed
successfully (yes, lack of error is also indication but this is
more user friendly imho).
