Adds a new `applescript` engine that controls the local Spotify app directly
via AppleScript instead of going through Spotify Connect cloud servers.
This solves the issue where Spotify Connect commands update the cloud state
but the local app doesn't receive them (device desynced/not registered).
The AppleScript engine:
- Handles playback control (play, pause, next, prev, seek, volume, shuffle, repeat)
- Falls back to web API for search, library, and playlist operations
- Only available on macOS (darwin)
Usage: spogo play <uri> --engine applescript
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>