dsh-cron-panel: DSH Web Cron Job Management Panel

`dsh-cron-panel` is a sidebar plugin for DSH Web GUI that provides visual management of scheduled tasks. It supports task creation using natural language, sectioned status display, and full-screen editing and preview, with features such as execution notifications, automatic retries, and backups. Users can install it via the official command; after restarting the service, they can manage DSH scheduled tasks and the system `crontab` directly from the sidebar.