Suggestion to add WebApp manifest in reactjs.org

If we allow users to Add to homescreen the https://reactjs.org I think it would be helpful for people who want to have react docs on their homescreen and it would allow them to easily access the docs anytime they want.
Along with this we can even set the theme color for URL bar.

we can add gatsby-plugin-manifest to achieve this.

Edit: If you guys are planning to implment it I would love to work on this. It would be my first contribution here

未指定文件或测试。首先查看 react.dev 的 Gatsby 设置和 gatsby-plugin-manifest 文档；完成标准是文档网站支持将应用添加到主屏幕，并为 URL 栏设置主题颜色。