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

Packages/AmphlifyKit/Tests/DomainTests/LyricsTests.swift

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+import Domain
+import Testing
+
+struct LyricsTests {
+    @Test func parsesSyncedLines() {
+        let lyrics = Lyrics(lrc: "[00:11.39]Первая\n[00:13.61][01:20.18]Повтор\n[02:00.75]\n")
+        #expect(lyrics?.isSynced == true)
+        #expect(lyrics?.lines.map(\.text) == ["Первая", "Повтор", "Повтор", ""])
+        #expect(lyrics?.lines[2].time == 80.18)
+        #expect(lyrics?.index(at: 5) == nil)
+        #expect(lyrics?.index(at: 12) == 0)
+        #expect(lyrics?.index(at: 90) == 2)
+    }
+
+    @Test func fallsBackToPlainText() {
+        let lyrics = Lyrics(lrc: "Просто строка\nЕщё одна")
+        #expect(lyrics?.isSynced == false)
+        #expect(lyrics?.lines.count == 2)
+        #expect(Lyrics(lrc: "") == nil)
+    }
+}