zh.po documents by the mdbook-i18n-helpers

[DrJingLee]

Following #2385,

Construct the new documents by mdbook-i18n-helpers;
Complete the Chaptor 3.
updating the remaining.

following ISO-639-1 code standard of languages:
zh = Chinese Version of Language

[raphjaph]

@DrJingLee I added some scaffolding and a language picker. you can see the page by installing just
and doing

just serve-docs

or if you do not want to install just it would be:

  mdbook build docs -d build
  MDBOOK_BOOK__LANGUAGE=zh mdbook build docs -d build/zh
  mv docs/build/zh/html docs/build/html/zh
  python3 -m http.server --directory docs/build/html --bind 127.0.0.1 8080

[raphjaph]

And .pot files are autogenerated so they do not have to be checked into git :)

[raphjaph]

It also seems that it's only partially translated:

[raphjaph]

I've delete the changes I made and opened a new PR #2403 for just the language picker things. Once that is merged you can merge those changes in here

[raphjaph]

I just merged #2403, so have a look at the updated README for instructions.

For this PR I will integrate into our build system tomorrow :)

[DrJingLee]

I just merged #2403, so have a look at the updated README for instructions.

For this PR I will integrate into our build system tomorrow :)

Great job @raphjaph 👍👍