feat(home-manager): service defs and fmt

fmt: reformatted using nixpkgs-fmt prettifier
mpd: created configuration
hypr: add window rules
commons: add usingMusicPlayerDaemon variable

home-manager/stvnliu/ags/config/mpris.js

@@ -0,0 +1,17 @@
+const mpris = await Service.import('mpris')
+
+/** 
+ * @param {import('types/service/mpris').MprisPlayer} player 
+ * */
+const Player = (player, count) => Widget.Button({
+  onClicked: () => player.playPause(),
+  child: Widget.Label().hook(player, label => {
+    const { track_artists, track_title } = player;
+    label.label = `${count} PLAYING`;
+  }),
+})
+
+export const players = Widget.Box({
+  children: mpris.bind('players').as(p => p.map(
+    (this_player, index, array) => { return Player(this_player, array.length) }))
+})