[project-index Page] Translate to Japanese

[manak1]

About the post

• [ ] I would like to suggest a topic;
• [x] I would like to write the post/article;

Category

• [ ] News
• [ ] HTML / Semantic
• [ ] ARIA
• [ ] WCAG
• [ ] Tools / Testing
• [ ] Vue A11y packages / UI libraries
• [ ] Single page app

None of the above categories? Describe a category that the subject of "post / article" makes the most sense.

• [x] Translate

Brief description

Translate jp/project/index.md to Japanese.

[manak1]

I would like to work on this issue!

[yamanoku]

@manak1 Please do 👍

[yamanoku]

@manak1 If you do the translation work, please also support overwriting the text and the following Frontmatter 😃

title: 日本語翻訳タイトル
description: 日本語翻訳description

meta:
  - property: 'og:image'
    content: 'https://vue-a11y.com/img/social-share-jp.png'
  - name: 'twitter:title'
    content: 日本語翻訳タイトル
  - name: 'twitter:description'
    content: 日本語翻訳description
  - name: 'twitter:image'
    content: 'https://vue-a11y.com/img/social-share-jp.png'