dsh-web-search: Web Search and Text Extraction for DSH

dsh-web-search is an MIT-licensed plugin that extends the web connectivity capabilities of DeepSeek Harness. It primarily offers two core functions: first is multi-engine search with automatic fallback, attempting in the order SearXNG, Tavily, Brave, and DuckDuckGo, automatically skipping unconfigured engines, with DuckDuckGo serving as a zero-config fallback; second is URL content extraction, converting web content into readable plain text via the `get_search_content` tool. Additionally, the plugin fixes the built-in `web_fetch` function and allows switching the default search engine or delegating to official search from the settings page. Key management supports environment variables and the credentials service, with environment variables taking precedence over the local service. Before installation, ensure No...