DSH Plugin dsh-task-control: Adding Task Pause, Resume, and Cancel to DSH Web

`dsh-task-control` is a plugin for DSH Web, designed to enhance control over long-running tasks with support for pausing, resuming, and canceling. This plugin is compatible with DSH v0.1.1-rc.2 and is licensed under the MIT License. It offers three pause modes: `safe wait` (default, waits for natural completion), `safe stop` (pauses after tool completion), and `force` (immediate interruption), and allows users to operate via buttons next to the input box or slash commands such as `/pause`, `/resume`, and `/cancel`. When resuming, users can choose to re-execute or skip the interrupted tool, ensuring that completed work is not repeated. The paused state is persistently saved and is not lost after a restart. Additionally, the plugin provides an API for other components to query and control task status. This tool is suitable for