DSH Tool Management Plugin

The DSH Tool Management Plugin is designed to address issues in DeepSeek Harness where an excessive number of tools leads to high context usage and the model overlooking infrequently used tools. The plugin allows users to load and group tools on demand via the WebUI, reducing unnecessary token consumption. Core features include enabling/disabling tools, manual/automatic grouping, and support for on-demand loading (via `tool_list` calls), making specific tool groups available only when required by a task. The plugin is maintained by pan17, requires DSH version 0.2.0-rc.2 or later, and does not stop underlying service processes.