dsh-coyote: DG-LAB Electrical Stimulation Plugin for DeepSeek Harness

`dsh-coyote` is a plugin for DeepSeek Harness (DSH) that connects to DG-LAB electrical stimulation devices, using a plugin-based architecture. It provides a unified safety boundary for Agent tool calls and web GUIs, including eight model-side tools, a visual control panel, and automatic stimulation functionality. The plugin enforces strict soft limits, hard limits, rate limits, and session cooldowns, includes 12 built-in waveform presets, and can be paired with the DG-LAB App via QR code. Usage requires Node.js >= 22 and involves physical risks, with operations strictly constrained by safety mechanisms.