dsh-rss-monitor: DeepSeek Harness Native RSS Subscription Monitoring Plugin

`dsh-rss-monitor` is a native plugin for DeepSeek Harness (DSH), designed to address RSS monitoring needs through the “everything is a plugin” philosophy. It supports multi-source subscriptions, keyword filtering, scheduled deduplication, and SMTP email notifications, and integrates a four-tab, bilingual (Chinese and English), native settings interface with an overview panel, time windows, and credential security protections. Installation requires attention to version and encoding compatibility; the plugin is feature-complete and secure, making it suitable for users who want automated monitoring of information feeds.