Sendmux/sendmux-sdk — Official monorepo of SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go…

**Brief Summary (2‑3 sentences)** Sendmux /sendmux‑sdk is the official monorepo that bundles SDKs, a CLI, and Model‑Context‑Protocol (MCP) servers for the Sendm