doc: Adds ArangoDB mcm server to Community Servers section of README.md

[ravenwits]

Added custom mcm server to Community Servers section of README.md

Server Details

• Server: mcp-server-aranngodb
• Changes to: README.md only (adding server reference)

Motivation and Context

Many people prefer to work with ArangoDB lately because of its multi-model capabilities. Having this server as a tool helps fellow developers to interact to the database without leaving their IDE or having to navigate to database web ui and write complex queries etc.

How Has This Been Tested?

I've tested each type of tool (insert,update,remove and list) using both claude desktop app and cline vscode extension.

Breaking Changes

Users will only need to add arango to their mcpServers config as follows:

{
  "mcpServers": {
    "arango": {
      "command": "node",
      "args": ["/path/to/arango-server/build/index.js"],
      "env": {
        "ARANGO_URL": "your_database_url",
        "ARANGO_DATABASE": "your_database_name",
        "ARANGO_USERNAME": "your_username",
        "ARANGO_PASSWORD": "your_password"
      }
    }
  }
}

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