Add standalone simple-chatbot project to monorepo

[Copilot]

Adds a standalone TypeScript chatbot project based on PR #1348 to the typescript-sdk, demonstrating multi-server MCP connections with LLM integration.

Structure

simple-chatbot/
├── src/simpleChatbot.ts          # Multi-server chatbot with tool discovery
├── test/simpleChatbot.test.ts    # Integration tests (10 passing)
├── package.json                  # build, test, test:watch scripts
├── vitest.config.ts
├── tsconfig.json
├── servers_config.json           # MCP server configuration
└── README.md

Key Adaptations

• SDK imports: Updated from split packages (@modelcontextprotocol/client, @modelcontextprotocol/core, @modelcontextprotocol/server) to unified @modelcontextprotocol/sdk with subpath exports
• Module resolution: Changed tsconfig from "node" to "bundler" for proper SDK import handling
• Test imports: Using McpServer from sdk/server/mcp.js instead of base Server class

Features

• Connects to multiple MCP servers via StdioClientTransport
• Discovers and executes tools across all connected servers
• Integrates with OpenAI-compatible LLM APIs (OpenAI, Groq, etc.)
• Maintains conversation state and handles tool execution flow

Usage

cd simple-chatbot
npm install && npm run build
export LLM_API_KEY=your_key
npm start

Original prompt

This repo is a monorepo for multiple different ai projects. The first project i want to add is basically the same example that i created a pr for here modelcontextprotocol/typescript-sdk#1348. But i want it as a standalone example, ie a folder called in this repo with the simpleChatbot.ts and its corresponding integration test. it should have a package.json file with scripts such as build, test, test:watch. Just like in the example i want to use vitest.

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