mcp-go MCP Server

From the README

<div align="center">

<strong>A Go implementation of the Model Context Protocol (MCP), enabling seamless integration between LLM applications and external data sources and tools.</strong>

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Discuss the SDK on [Discord](https://discord.gg/RqSS2NQVsY)

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```go
package main

import (
    "context"
    "fmt"

    "github.com/mark3labs/mcp-go/mcp"
    "github.com/mark3labs/mcp-go/server"
)

func main() {
    // Create a new MCP server
    s := server.NewMCPServer(
        "Demo 🚀",
        "1.0.0",
        server.WithToolCapabilities(false),
    )

    // Add tool
    tool := mcp.NewTool("hello_world",
        mcp.WithDescription("Say hello to someone"),
        mcp.WithString("name",
            mcp.Required(),
            mcp.Description("Name of the person to greet"),
        ),
    )

    // Add tool handler
    s.AddTool(tool, helloHandler)

    // Start the stdio server
    if err := server.ServeStdio(s); err != nil {
        fmt.Printf("Server error: %v\n", err)