xby-text-transformer: DSH Text Transformation Plugin

`xby-text-transformer` is a lightweight text-processing plugin designed for DeepSeek Harness (DSH). It integrates as an MCP server to address common text cleaning and formatting needs in agent development, eliminating the need for developers to write complex logic themselves. The plugin provides core tools such as setting an API key, case conversion, text reversal, palindrome detection, word counting, and whitespace removal. Users must first register on the official website to obtain an API key, and after installation, the plugin can be called directly in DSH. Licensed under the MIT License, it is suitable for scenarios that require quick integration of text preprocessing capabilities.