dsh-codex-web-search-mcp: Integrate codex-web-search-mcp into the Internet Plugin of DeepSeek Harness

`dhicoc/dsh-codex-web-search-mcp` is a one-click plugin that adds web search and deep research capabilities to DeepSeek Harness (dsh). This plugin registers the model-agnostic `codex-web-search-mcp` as a dsh tool, simplifying the manual configuration process. After installation, three core tools are provided in dsh web sessions: single-step search (`codex_web_search`), multi-step deep research (`codex_web_research`), and content fetching (`web_fetch`). These tools operate via Codex independent endpoints, requiring no specific model vendor support, and return clear Chinese error messages when valid credentials are missing. Users can quickly install via npm commands...