fix: add sample dapp

packages/examples/dnode-dapp/.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "next/core-web-vitals"
+}

packages/examples/dnode-dapp/.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*
+.pnpm-debug.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo

packages/examples/dnode-dapp/.npmrc

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+strict-peer-dependencies = false

packages/examples/dnode-dapp/README.md

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+This is a [RainbowKit](https://rainbowkit.com) + [wagmi](https://wagmi.sh) + [Next.js](https://nextjs.org/) project bootstrapped with [`create-rainbowkit`](/packages/create-rainbowkit).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `pages/index.tsx`. The page auto-updates as you edit the file.
+
+## Learn More
+
+To learn more about this stack, take a look at the following resources:
+
+- [RainbowKit Documentation](https://rainbowkit.com) - Learn how to customize your wallet connection flow.
+- [wagmi Documentation](https://wagmi.sh) - Learn how to interact with Ethereum.
+- [Next.js Documentation](https://nextjs.org/docs) - Learn how to build a Next.js application.
+
+You can check out [the RainbowKit GitHub repository](https://github.com/rainbow-me/rainbowkit) - 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 the [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

packages/examples/dnode-dapp/next-env.d.ts

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+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.

packages/examples/dnode-dapp/next.config.js

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