docs: add MCP Server for MCP Registry to community-projects (#579)

<!-- Provide a brief summary of your changes -->

## Motivation and Context
Add MCP Server for MCP Registry to community-projects

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
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the boxes that apply: -->
- [ ] 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)
- [x] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
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-->

docs/community-projects.md

@@ -9,6 +9,7 @@ The following is a list of notable community-driven projects in the ecosystem re
 - [mcp-registry-cli](https://pypi.org/project/mcp-registry-cli/) - CLI tool to navigate the MCP registry servers
 - [mcp-insights](https://github.com/joelverhagen/mcp-insights/) - Analytics and insights for the MCP Registry
 - [Open Chat MCP Registry Client](https://github.com/cameronapak/open-chat/blob/main/apps/server/src/lib/mcp-registry/index.ts) - TypeScript client for the MCP Registry
+- [MCP Server for MCP Registry](https://github.com/formulahendry/mcp-server-mcp-registry) - MCP Server to discover and search for available MCP servers in the registry
 - Add your project here!
 
 ## Adding Your Project