dsh-ptc-plus: A Session-Bound Native REPL Alternative for DeepSeek Harness PTC Mode

`dsh-ptc-plus` is a community plugin for DeepSeek Harness (DSH), designed to address the low efficiency caused by state isolation in PTC mode. It natively substitutes the REPL while preserving session variables, functions, and imports, supports code revisions, module syntax, and special values, and provides a workbench and binding draft features. Aimed at `danger-full-access` users, it is suitable for scenarios requiring continuous debugging and state reuse, and can significantly improve development efficiency.