Add Mercado Pago's official MCP Server

[pablozamudio]

Description

Add official Mercado Pago MCP Server (http://mcp.mercadopago.com/) on Official Integrations section.

Server Details

Add new official MCP Server for Mercado Pago, to enhance developer experience integrating Mercado Pago solutions.
Server is hosted remotely by Mercadolibre supporting new Streamable HTTP Transport.
Details on how to connect to the server and example use cases are provided in Mercado Pago's MCP Server doc site.

Motivation and Context

Provide official MCP Server for Mercado Pago to enhance developers experience integrating with this platform.

How Has This Been Tested?

Integration with the server was tested from several clients, including: Cursor, Windsurf, Cline and Claude Desktop.

Breaking Changes

N/A

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

N/A