Vendored, unmodified copy of nlohmann/json's single-header release, used by
the MCP server (src/mcp/) to parse and build JSON-RPC messages.

Source:  https://github.com/nlohmann/json
Version: 3.11.3
File:    single_include/nlohmann/json.hpp
License: MIT, see LICENSE.txt in this directory.

Do not hand-edit json.hpp; replace it wholesale with a newer release's
single_include/nlohmann/json.hpp if an upgrade is needed.
