bitwig-studio: add pipewire as a build dependency

Bitwig Studio v4.3 brought native support for pipewire. This change adds
'pipewire' as a build dependency, making libpipwire available in the
environment.

https://www.bitwig.com/stories/bitwig-studio-43-space-and-tone-197/

pkgs/applications/audio/bitwig-studio/bitwig-studio4.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchurl, alsa-lib, cairo, dpkg, freetype
 , gdk-pixbuf, glib, gtk3, lib, xorg
 , libglvnd, libjack2, ffmpeg
-, libxkbcommon, xdg-utils, zlib, pulseaudio
+, libxkbcommon, xdg-utils, zlib, pipewire, pulseaudio
 , wrapGAppsHook, makeWrapper }:
 
 stdenv.mkDerivation rec {
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   dontWrapGApps = true; # we only want $gappsWrapperArgs here
 
   buildInputs = with xorg; [
-    alsa-lib cairo freetype gdk-pixbuf glib gtk3 libxcb xcbutil xcbutilwm zlib libXtst libxkbcommon pulseaudio libjack2 libX11 libglvnd libXcursor stdenv.cc.cc.lib
+    alsa-lib cairo freetype gdk-pixbuf glib gtk3 libxcb xcbutil xcbutilwm zlib libXtst libxkbcommon pipewire pulseaudio libjack2 libX11 libglvnd libXcursor stdenv.cc.cc.lib
   ];
 
   installPhase = ''