chore: add nextjs example. (#568)

Author: jaywcjlove

example/nextjs/.eslintrc.json

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+{
+  "extends": "next/core-web-vitals"
+}

example/nextjs/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

example/nextjs/README.md

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+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun run dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

example/nextjs/next.config.js

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+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+module.exports = nextConfig;

example/nextjs/package.json

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+{
+  "name": "nextjs",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@types/node": "20.6.2",
+    "@types/react": "18.2.22",
+    "@types/react-dom": "18.2.7",
+    "autoprefixer": "10.4.15",
+    "eslint": "8.49.0",
+    "eslint-config-next": "13.5.1",
+    "next": "13.5.1",
+    "postcss": "8.4.30",
+    "react": "18.2.0",
+    "react-dom": "18.2.0",
+    "tailwindcss": "3.3.3",
+    "typescript": "5.2.2"
+  },
+  "devDependencies": {
+    "@uiw/react-codemirror": "4.21.13"
+  }
+}

example/nextjs/postcss.config.js

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+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};

example/nextjs/public/next.svg

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+'use client';
+
+import CodeMirror from '@uiw/react-codemirror';
+
+export default function Editor() {
+  return <CodeMirror value="aaaa" theme="dark" width="500px" height="500px" onChange={() => {}} />;
+}