feat: add the nextjs starter template to examples/ dir

examples/agent-kit-nextjs-langchain/package.json

@@ -0,0 +1,44 @@
+{
+	"name": "langchain-nextjs-template",
+	"version": "0.0.0",
+	"private": true,
+	"scripts": {
+		"dev": "next dev",
+		"build": "next build",
+		"start": "next start",
+		"lint": "next lint",
+		"format": "prettier --write \"app\""
+	},
+	"engines": {
+		"node": ">=18"
+	},
+	"dependencies": {
+		"@langchain/community": "^0.3.11",
+		"@langchain/core": "^0.3.17",
+		"@langchain/langgraph": "^0.2.20",
+		"@langchain/openai": "^0.3.11",
+		"@next/bundle-analyzer": "^13.4.19",
+		"@supabase/supabase-js": "^2.32.0",
+		"@types/node": "20.12.12",
+		"@types/react": "18.3.2",
+		"@types/react-dom": "18.3.0",
+		"ai": "^3.1.12",
+		"autoprefixer": "10.4.14",
+		"eslint": "8.46.0",
+		"eslint-config-next": "13.4.12",
+		"langchain": "^0.3.5",
+		"next": "^14.2.3",
+		"postcss": "8.4.27",
+		"react": "^18.3.1",
+		"react-dom": "^18.3.1",
+		"react-toastify": "^9.1.3",
+		"solana-agent-kit": "^1.3.0",
+		"tailwindcss": "3.3.3",
+		"typescript": "5.1.6",
+		"zod": "^3.22.3",
+		"zod-to-json-schema": "^3.21.4"
+	},
+	"devDependencies": {
+		"prettier": "3.0.0"
+	}
+}