Add FXMacroData MCP to finance data providers

[roberttidball]

Summary

Adds FXMacroData MCP to the Financial Data & Analytics table.

• Direct link to the working public MCP server repository.
• Finance-data scope: macro indicators, FX, release calendars, COT, and commodities.
• Description is under 60 characters.
• Pricing is listed as Freemium because documented no-key USD access is available alongside paid protected datasets.

Verification

• Confirmed the repository is public and documents installation and MCP client configuration.
• Confirmed the production API reference documents always-free discovery/calendar routes and a USD no-key evaluation window.
• Confirmed there is no duplicate FXMacroData issue or PR other than this draft.
• git diff --check passed.
• The added line contains no credentials, local paths, internal hosts, or confidential implementation details.

Disclosure

I am FXMacroData's owner.