rework mpris, less features but easier to build out player selector later

services/Mpris.qml

@@ -0,0 +1,12 @@
+pragma Singleton
+
+import QtQuick
+import Quickshell
+import Quickshell.Services.Mpris
+
+Singleton {
+    id: root
+
+    property list<MprisPlayer> players: Mpris.players.values
+    property MprisPlayer active: players.filter(player => player.isPlaying)[0] ?? players[0]
+}