feat(mcp): add Frankfurter currency MCP server, client, and README

[iyanuashiri]

Frankfurter Currency MCP Server & Client

Adds a community contribution under 6_mcp/community_contributions/iyanuashiri/.

What's included

• server.py — MCP server using the Frankfurter v1 API (ECB rates, no API key required), exposing three tools over stdio
• client.py — MCP client with raw protocol helpers and typed convenience wrappers for each tool, plus a runnable demo
• README.md — setup instructions, tool reference, and integration guide for Claude Desktop / Cursor

Tools

Tool	Description
convert_currency	Convert an amount between two currencies
get_exchange_rate	Get the mid-market rate between two currencies
list_supported_currencies	List all supported ISO 4217 currency codes

Testing

uv run 6_mcp/community_contributions/iyanuashiri/client.py

[iyanuashiri]

@hopeogbons I am sorry I implemented it late. This is the PR. Thank you so much!