Update Claude.ai MCP documentation

Add documentation for claude.ai which now supports rMCP servers.

Author: felixweinberger

docs/clients.mdx

@@ -214,6 +214,15 @@ Claude Code is an interactive agentic coding tool from Anthropic that helps you
 - Tool and prompt support for MCP servers
 - Offers its own tools through an MCP server for integrating with other MCP clients
 
+### Claude.ai
+[Claude.ai](https://claude.ai) is Anthropic's web-based AI assistant that provides MCP support for remote servers.
+
+**Key features:**
+- Support for remote MCP servers via integrations UI in settings
+- Access to tools, prompts, and resources from configured MCP servers
+- Seamless integration with Claude's conversational interface
+- Enterprise-grade security and compliance features
+
 ### Claude Desktop App
 The Claude desktop application provides comprehensive support for MCP, enabling deep integration with local tools and data sources.
 
@@ -223,8 +232,6 @@ The Claude desktop application provides comprehensive support for MCP, enabling
 - Tool integration for executing commands and scripts
 - Local server connections for enhanced privacy and security
 
-> ⓘ Note: The Claude.ai web application does not currently support MCP. MCP features are only available in the desktop application.
-
 ### Cline
 [Cline](https://github.com/cline/cline) is an autonomous coding agent in VS Code that edits files, runs commands, uses a browser, and more–with your permission at each step.