@tonydua/dsh-web-search-exa: Keyless Exa Search Plugin for DeepSeek Harness

`@tonydua/dsh-web-search-exa` is a zero-configuration Exa search plugin for DeepSeek Harness (DSH), supporting Node.js >=18 and licensed under MIT. By default, this plugin performs searches through an anonymous MCP service (`mcp.exa.ai/mcp`) and can be used without an API key. If the `EXA_API_KEY` is configured, it automatically switches to the Exa REST API for a more stable service. Acting as a drop-in provider for the `ctx.web` seam, it is compatible with existing `web_search` and `web_fetch` tools without requiring any modifications to the original configuration. Installation is done via the `dsh plugin`