docs(clients.mdx): add think-mcp-host to supported applications list - #192

Dear @dsp-ant ,

I would like to request your review for this PR that adds think-mcp-host to the supported applications list.

think-mcp-host is an intelligent agent application based on Model Context Protocol (MCP) that supports various types of large language models. It features a command-line interface for seamless interaction, allowing users to engage with AI models through intuitive terminal commands. It can help you work with AI in a zen-like and loving mindset, hoping to bring you inspiration, joy, and peace.

Key features:

• Full support for MCP architecture (Host/Client/Server). For more details, please refer to think-mcp-host, think-mcp-client, and think-mcp-server.
• Comprehensive support for all MCP resource types (Resources, Prompts, Tools)
• Dynamic MCP command insertion anywhere in conversations
• Standalone MCP tool execution support

I'd like to mention that think-mcp-host was previously a closed-source commercial project, but we've now decided to open-source it to enrich the MCP ecosystem. I greatly appreciate you taking the time to review this PR and hope it can be approved!

Thank you!