DeepSeek Harness k6 Plugin: Enabling dsh Agents to Author Load Tests

`wode25500/dsh-k6` is a community plugin for DeepSeek Harness, designed to improve development efficiency through an automated toolchain. Built on Grafana k6, it provides DSH agents with native capabilities to write, execute, and analyze load tests. The plugin includes four core tools: version lookup, script execution, scenario management, and smoke testing, and supports exporting JSON summaries containing key metrics such as response time and error rate. During installation, the `k6` path and timeout parameters must be configured. Developers should note that the plugin runs with the current process permissions, and because it is based on the AGPL-3.0 license, source code compliance must be ensured.