Update feature matrix for Cursor (added prompts support)

Motivation and Context

The IDE Cursor now support prompts, by hitting \ in the chat box they will be listed.

How Has This Been Tested?

Tested on Cursor

Version: 1.4.5 (Universal)
VSCode Version: 1.99.3
Commit: af58d92614edb1f72bdd756615d131bf8dfa5290
Date: 2025-08-13T02:08:56.371Z 

Using Port MCP Server :

 "port-eu": {
          "url": "https://mcp.port.io/v1"
        }

Breaking Changes

None

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)
• [x ] Documentation update

Checklist

• [x ] I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• [ x] I have added or updated documentation as needed