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

Packages/AmphlifyKit/Sources/Domain/Identity.swift

@@ -0,0 +1,23 @@
+import Foundation
+
+public struct SourceID: Hashable, Codable, Sendable {
+    public let raw: UUID
+
+    public init(_ raw: UUID = UUID()) {
+        self.raw = raw
+    }
+}
+
+public struct EntityID: Hashable, Codable, Sendable {
+    public let source: SourceID
+    public let remote: String
+
+    public init(source: SourceID, remote: String) {
+        self.source = source
+        self.remote = remote
+    }
+}
+
+public enum EntityKind: String, Codable, Sendable {
+    case artist, album, track, playlist, station
+}