docs(nextjs): add basic example

This has only been verified with `npm run dev`; building for production tbc.

examples/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
+.yarn/install-state.gz
+
+# 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

examples/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 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.

examples/nextjs/next.config.mjs

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+/** @type {import("next").NextConfig} */
+const nextConfig = {
+  webpack: (
+    config,
+    { buildId, dev, isServer, defaultLoaders, nextRuntime, webpack },
+  ) => {
+    config.resolve.fallback = {
+      crypto: false,
+      stream: false,
+      buffer: false,
+      vm: false,
+    };
+
+    config.module.rules.push({
+      test: /\.wasm$/,
+      type: "asset/resource",
+    });
+
+    return config;
+  },
+  async headers() {
+    return [
+      {
+        source: "/:path*",
+        headers: [
+          { key: "Cross-Origin-Embedder-Policy", value: "require-corp" },
+          { key: "Cross-Origin-Opener-Policy", value: "same-origin" },
+        ],
+      },
+    ];
+  },
+  async rewrites() {
+    return [
+      {
+        source: "/nilchain",
+        destination: "http://127.0.0.1:48102/",
+      },
+    ];
+  },
+};
+
+export default nextConfig;