Add a keyless Parallel Search MCP client example

[georgeatparallel]

Adds a runnable C++ example for free, keyless Parallel Search MCP using fastmcpp’s existing CurlTransport and Client. Enable the curl transport, build fastmcpp_example_parallel_search, then use the search or fetch command to print URLs and excerpts. The example discovers tools before dispatch, verifies TLS certificates, and bounds requests to 120 seconds. Anonymous access is intended for light use and subject to rate limits. Existing defaults are unchanged.

I work at Parallel. For context: Artificial Analysis’s Search API benchmarks.

Tested: clean CMake build, anonymous live search and fetch through the example, request headers, and invalid command handling.

[0xeb]

Thank you, but I'm gonna pass because I'd like to keep the examples vendor neutral.