DSH-Perlica-Ding: DeepSeek Harness Tiered Task Prompt Tone Plugin

`dsh-perlica-ding` is a DeepSeek Harness (DSH) plugin designed to optimize task execution experience through sound alerts. It plays distinct notification tones at key milestones such as plan generation, task completion, approval requests, and error reporting, while remaining silent during normal Q&A to avoid disturbances. The plugin features built-in Perlica-style sound effects, supports cross-platform operation on Windows, macOS, and Linux, and works out-of-the-box with no configuration required after installation, including when the window is in the background. Core features include: sounding only when the main conversation round is uniformly concluded, preventing sub-agents from ringing individually; a 2.5-second debounce interval for each sound tier; and configurable options such as a master switch, debounce time, custom sound effect directory, and an execution tool list. Users can install it via GitHub or npm and need to restart DSH W