dsh-fs-encoding: DeepSeek Harness File Encoding Guardian

The DeepSeek Harness plugin `dsh-fs-encoding`, developed by MrWeiCodes, is designed to address the issue that AI-native file tools only support UTF-8. It takes over the native tools and, through byte-level fidelity, BOM restoration, and intelligent encoding detection, supports multiple encodings such as GBK, Shift-JIS, and EUC-KR, ensuring that file reads and writes are not corrupted. It provides additional tools such as `insert` and `undo_last_edit`, and is fully compatible with the native API, making it suitable for maintaining legacy systems or handling multilingual files.