add schema markup

[icewyvrn]

please add schema markup / structured data, thank you and nice theme!
https://developers.google.com/search/docs/advanced/structured-data/intro-structured-data

hexo theme example: https://github.com/LouisBarranqueiro/hexo-theme-tranquilpeak/blob/669623647898e628acf273df1e29d99a9d1d8b8f/scripts/helpers/json_ld.js

[github-actions]

👋 Hello,
Your suggestion is great, we will add this feature in subsequent versions, thank you very much!

👋 您好，
您的建议很棒，我们将会在后续版本中加入这个功能，非常感谢！