Support diagram

https://docusaurus.io/docs/next/markdown-features/diagrams

Upgrade docusaurus to latest version

npm i @docusaurus/core@latest @docusaurus/preset-classic@latest @docusaurus/theme-mermaid@latest @docusaurus/module-type-aliases@latest @docusaurus/tsconfig@latest @docusaurus/types@latest

docusaurus.config.js

export default {
  markdown: {
    mermaid: true,
  },
  themes: ['@docusaurus/theme-mermaid'],
};