Bugu v0.1.0

Bugu MVP release.\n\n- macOS menu bar app for long-running local coding agents\n- Keep Mac awake toggle and agent watcher\n- Five Apple system sound status cues with alert volume control\n- Debug tools for simulated agent start/interruption\n\nBuild verified with:\n\nbash\nswift build\n./script/build_and_run.sh --verify\n