feat(spotify_player): add service/program module

modules/programs/spotify_player.nix

@@ -0,0 +1,33 @@
+{ config
+, lib
+, pkgs
+, ...
+}:
+
+with lib;
+let
+  cfg = config.my.programs.spotify-player;
+  toml = pkgs.formats.toml { };
+in
+{
+  options.my.programs.spotify-player = {
+    enable = mkEnableOption "spotify-player";
+    package = mkOption {
+      type = types.package;
+      default = pkgs.spotify-player;
+    };
+    config = mkOption {
+      inherit (toml) type;
+      default = { };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home-manager.users.moritz = {
+      xdg.configFile."spotify-player/app.toml" = {
+        source = toml.generate "app.toml" cfg.config;
+      };
+      home.packages = [ cfg.package ];
+    };
+  };
+}