feat(*): subsonic client with avfoundation playback and apple music ui

Packages/AmphlifyKit/Tests/SourceSubsonicTests/Fixtures/extensions.json

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+{"subsonic-response":{"status":"ok","version":"1.16.1","type":"navidrome","serverVersion":"0.63.2 (be10f89c)","openSubsonic":true,"openSubsonicExtensions":[{"name":"transcodeOffset","versions":[1]},{"name":"formPost","versions":[1]},{"name":"songLyrics","versions":[1,2]},{"name":"indexBasedQueue","versions":[1]},{"name":"transcoding","versions":[1]},{"name":"playbackReport","versions":[1]}]}}