chore: skeleton for MusicKitJS abstractions

web/src/ts/player/state.ts

@@ -0,0 +1,21 @@
+import {
+    type Ref,
+    ref
+} from 'vue';
+import type {
+    Playlist
+} from '../dtype/playlist';
+
+export const queueIdx = ref( 0 );
+
+export const queue: Ref<Playlist> = ref( [] );
+
+export const isPlaying = ref( false );
+
+export const shuffle = ref( false );
+
+export const repeat: Ref<'off' | 'one' | 'all'> = ref( 'off' );
+
+export const playbackPercentage = ref( 0 );
+
+export const duration = ref( 0 );