Update docs and gitignore to match actual project state

Fix LaunchAgent: portable path, modern launchctl API

Rewrite menubar app: native NSMenu, async parallel refresh, clickable speaker grouping

Rewrite audioctl.sh with JSON parsing, proper error handling, scenes support

Remove dead code: broken AppleScript, stale binary, stub demos

Use helper script to avoid shell quoting issues

Fix shell command quoting issues

Add visual volume bars [██████░░░░] and playing indicators

Add Pause All / Play All / Party buttons

Show ALL Sonos speakers with individual status (music vs TV vs idle per room)

Add Sonos integration - detect what's playing on speakers

Add comprehensive debug logging to menubar app

Fix speaker detection with full path to system_profiler

Show ALL speakers + AirPlay devices, add quit button

Fix AirPlay detection for older macOS versions