Add OpenClaw plugin entry. Same npm package now ships both a stdio MCP server and a native OpenClaw plugin (12 tools, all always-on). Phase B Python TRX layer unchanged. Refactored internal tool layout to per-tool factory files; no changes to tool inputs/outputs for existing MCP clients.
Install via OpenClaw: openclaw plugins install clawhub:maltego
Install via npm: npm install -g maltego-mcp