add next multichain example

dapps/appkit/next-multichain-app-router/.env.example

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+NEXT_PUBLIC_PROJECT_ID=

dapps/appkit/next-multichain-app-router/.eslintrc.json

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+{
+  "extends": ["next/core-web-vitals", "next/typescript"]
+}

dapps/appkit/next-multichain-app-router/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# env files (can opt-in for committing if needed)
+.env
+.env.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

dapps/appkit/next-multichain-app-router/README.md

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+# Reown AppKit Example using wagmi+Solana (next.js with App Router)
+
+This is a Next.js project.
+
+## Usage
+
+1. Go to [Reown Cloud](https://cloud.reown.com) and create a new project.
+2. Copy your `Project ID`
+3. Rename `.env.example` to `.env` and paste your `Project ID` as the value for `NEXT_PUBLIC_PROJECT_ID`
+4. Run `pnpm install` to install dependencies
+5. Run `pnpm run dev` to start the development server
+
+## Resources
+
+- [Reown — Docs](https://docs.reown.com)
+- [Next.js — Docs](https://nextjs.org/docs)

dapps/appkit/next-multichain-app-router/next.config.ts

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+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  /* config options here */
+};
+
+export default nextConfig;

dapps/appkit/next-multichain-app-router/package.json

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+{
+  "name": "next-wagmi-app-router",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@reown/appkit": "^1.3.2",
+    "@reown/appkit-adapter-solana": "^1.3.2",
+    "@reown/appkit-adapter-wagmi": "^1.3.2",
+    "@solana/wallet-adapter-wallets": "^0.19.32",
+    "@tanstack/react-query": "^5.59.20",
+    "next": "15.0.3",
+    "react": "19.0.0-rc-66855b96-20241106",
+    "react-dom": "19.0.0-rc-66855b96-20241106",
+    "viem": "^2.21.44",
+    "wagmi": "^2.12.31"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "eslint": "^8",
+    "eslint-config-next": "15.0.3",
+    "typescript": "^5"
+  }
+}