Mario Zechner, libGDX creator, ports his AI agent pibot's speech engines to Rust for zero-Python local inference

pibot is now running fully local, using parakeet for STT, qwen3-tts for TTS, and Qwen 3.6 as the local multi-modal LLM via llama.cpp. The STT and TTS inference engines are Rust/mlx-c based. Ported from Python. So, zero Python dependencies :D