Add MCP TypeScript server and client starter

[mx369]

Motivation

• Provide a minimal TypeScript (Node.js) starter that implements an MCP server and a client so developers can quickly run and experiment with MCP tools.
• Include a simple built-in ping tool and an api_request tool that forwards requests to an external API using an API key from the environment.
• Supply project configuration, environment template, and documentation to make the project runnable out of the box.

Description

• Add src/server.ts which creates an McpServer, registers a ping tool, and registers an api_request tool with zod input validation that forwards HTTP requests using fetch and an API_KEY from the environment.
• Add src/client.ts which creates a Client that starts the server via StdioClientTransport, lists tools, calls the ping tool, and can optionally call api_request when RUN_API_REQUEST=true.
• Add project files including package.json (dependencies: @modelcontextprotocol/sdk, dotenv, zod), tsconfig.json, and an environment template .env.example for configuration.
• Update README.md with setup, run, and build instructions and examples for running the client and server.

Testing

• No automated tests were run as part of this change.

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Codex Task