DeepSeek Harness Plugin: dsh-duration (Duration Formatting)

`dsh-duration` is a local duration formatting plugin for DeepSeek Harness (DSH), maintained by istone. It converts timestamps or seconds into a human-readable format without network requests. Users can install it via `dsh plugin add` and enable it in the Profile’s `package.json`. The plugin runs with the current process’s permissions; its code is open-source, making it suitable for scenarios that require fast local processing of time data.