added dedicated focusrite scarlett, appimage modules, modified cloud

these new modules include only packages, no other configuration. maybe
later but none currently

modules/sound/focusrite.nix

@@ -0,0 +1,33 @@
+# Must be paired with the pipewire Nix module, this does nothing but install packages
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.sound.hardware.focusrite;
+in {
+  options.focusrite = {
+    enable = mkEnableOption "Focusrite audio interface support";
+    guiSupport = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable GUI support for Focusrite Scarlett audio interface (installs alsa-scarlett-gui)";
+    };
+  };
+  config = mkIf cfg.enable (mkMerge [
+    {
+      environment.systemPackages = with pkgs;
+        [
+          scarlett2
+          alsa-scarlett-gui
+        ]
+        ++ (
+          if cfg.guiSupport
+          then [pkgs.alsa-scarlett-gui]
+          else []
+        );
+    }
+  ]);
+}