docs(mcp): add a keyless Parallel search and fetch example

[georgeatparallel]

Adds a runnable Parallel Search MCP example through Fabric's existing mcporter integration. Merge the provided entry into config/mcporter.json, then run the TypeScript program with fabric_exec to search the web and fetch a page without a Parallel API key. Anonymous access is free for light use and rate limited. Existing servers and runtime defaults stay unchanged.

I work at Parallel. For context, here are Artificial Analysis's Search API benchmarks.

Tested: the documented program through Fabric with local HTTP and the live anonymous endpoint, including search, fetch and request headers; type checking and a fresh build passed. The affected checks also found five documentation-style failures reproduced at the unchanged base.

[monotykamary]

Thanks for the careful write-up and the test, George. I'm going to pass on this one: pi-fabric's docs stay vendor-neutral, and I'd rather not maintain a provider-specific page and a test that parses it.

Parallel works with Fabric today without any doc changes. Anyone who wants it can add it to config/mcporter.json like any other Streamable HTTP server. If Parallel would like to support the project, the sponsorship tiers in the README are open.