dsh-coding-tools: Secure Bounded Coding Tools for DeepSeek Harness

`dsh-coding-tools` is a plugin that provides controlled coding capabilities for DeepSeek Harness (DSH), intended to avoid disrupting the core environment. The plugin offers core features such as code reading, atomic editing, AST static analysis, and LSP queries within a secure sandbox, and supports version tokens to ensure the atomicity and safety of edits. Installation requires specific Node.js and DSH version requirements and a configured Profile to provide the complete toolchain and sandbox policy. The tool places particular emphasis on security boundaries; it currently does not include AST editing or DAP debugging, and restricted isolation mode should be used cautiously on Windows.