I want to translate markdown files into Japanese

[kamome-run]

I would like to translate the markdown files into Japanese so that I can spread VitePress to Japanese developers.
Eventually, I would like to translate all the documentation into Japanese.
I am currently working on translating these into Japanese.

[kamome-run]

I just sent a pull request.

Description

I have translated the files listed below into Japanese.

README.md
.github/commit-convention.md
.github/contributing.md
__tests__/e2e/markdown-extensions/index.md

Pull request

feat(i18n): translate markdown files into japanese #4527

Please peer review and merge.

[kamome-run]

I just sent a pull request.

Description

I added a Japanese translation of the document to docs/ja/index.md.

Pull request

I want to translate markdown files into Japanese #4514

Please review and merge.