docs: add Redis, Travel Planner, JSON and Calendar MCP servers to community servers list

[GongRzhe]

Description

Adding four new community MCP servers that expand the ecosystem's capabilities:

1. Redis MCP Server - For Redis database operations and caching
2. Travel Planner MCP Server - For travel planning using Google Maps API
3. JSON MCP Server - For JSON data processing and querying
4. Calendar MCP Server - For Google Calendar integration

Server Details

Adding four new servers to the Community Servers section:

1. Redis MCP Server

   • Tools: set, get, delete, list
   • Features: Key-value operations, expiration management
   • Package: @gongrzhe/[email protected]

2. Travel Planner MCP Server

   • Tools: searchPlaces, getPlaceDetails, calculateRoute, getTimeZone
   • Features: Location search, place details, route calculation
   • Package: @gongrzhe/server-travelplanner-mcp

3. JSON MCP Server

   • Tools: query, filter
   • Features: JSONPath operations, array/string/numeric/date operations
   • Package: @gongrzhe/[email protected]

4. Calendar MCP Server

   • Tools: create/update/delete/list events
   • Features: Google Calendar integration, OAuth2 authentication
   • Package: @gongrzhe/server-calendar-mcp

Motivation and Context

These servers add important functionality to the MCP ecosystem:

• Database operations (Redis)
• Travel and location services (Travel Planner)
• Data processing and querying (JSON)
• Calendar management (Calendar)

How Has This Been Tested?

All servers have been tested with Claude Desktop as the LLM client, with configuration examples provided in their respective READMEs.

Types of changes

• New feature (non-breaking change which adds functionality)
• 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
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

All servers are implemented in TypeScript/JavaScript and provide:

• Detailed installation instructions
• Configuration examples for Claude Desktop
• Clear documentation of tools and features
• Security considerations and best practices