SDK: Rust support

[dkontango]

Create a Rust SDK for TangoKore.

Rust SDK should provide:

• Machine enrollment (SSE and WebSocket protocols)
• Machine fingerprinting (OS, hardware, network, system)
• Agent for heartbeat and telemetry
• CLI binary (kontango-rust)
• Same functionality as Go SDK
• Performance optimizations unique to Rust

Priority: Medium (performance-critical deployments)