dsh-subagent-cursor: Local Cursor Subagent Provider

`dsh-subagent-cursor` is a DeepSeek Harness plugin that registers Cursor as a subagent via a Profile Bundle, providing local one-shot task execution capabilities. It supports both CLI-driven and SDK-driven modes, and features automatic permission management, summary-first result presentation, and command approval level configuration (balanced/trusted/strict). After installation, it must be mounted in the configuration. Note that CLI mode requires prior login and does not support backgroundMode, making it suitable for scenarios that require securely embedding local code execution capabilities into an agent chain.