Add MCP Router to community resources in README

[fjm2u]

Description

I'm adding a link to MCP Router with this PR. It's a free and community-driven software designed to manage your MCP servers with security and visualization.

Server Details

• Server:
• Changes to:
  N/A

Motivation and Context

MCP Router is a free software that simplifies MCP management while providing seamless app authentication and powerful log visualization.

How Has This Been Tested?

Yes

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

[fjm2u]

@olaservo, @cliffhall
Hello,

Could you please merge this PR when you have a moment?
I believe it would be very helpful to the community.

Thank you in advance!

[cliffhall]

LGTM! 👍