doc: add textin mcp service

[wangchenran]

Description

Add link for textin-mcp.

TextIn MCP Server is a tool for extracting text and performing OCR on documents, including document text recognition, ID recognition, and invoice recognition. It also supports converting documents into Markdown format.

https://github.com/intsig-textin/textin-mcp

Server Details

• Server: textin-mcp https://github.com/intsig-textin/textin-mcp
• Changes to:

Motivation and Context

TextIn.com is a document processing platform that offers services such as document text recognition and image processing.

How Has This Been Tested?

I used it

Breaking Changes

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

[wangchenran]

@evalstate Could you please review this when you get a moment? Thanks a lot.

[olaservo]

Thanks for your contribution to the servers list. This has been merged in this combined PR: #2144

This is a new process we're trying out, so if you see any issues feel free to re-open the PR and tag me.