Sound (Haiku): add stub file

CMakeLists.txt

@@ -1139,7 +1139,7 @@ elseif(Haiku)
         src/detection/poweradapter/poweradapter_nosupport.c
         src/detection/processes/processes_haiku.c
         src/detection/gtk_qt/qt.c
-        src/detection/sound/sound_nosupport.c
+        src/detection/sound/sound_haiku.cpp
         src/detection/swap/swap_haiku.c
         src/detection/terminalfont/terminalfont_linux.c
         src/detection/terminalshell/terminalshell_linux.c
@@ -1616,6 +1616,7 @@ elseif(ANDROID)
 elseif(Haiku)
     target_link_libraries(libfastfetch
         PRIVATE "network"
+        PRIVATE "media"
         PRIVATE "be"
         PRIVATE "gnu"
     )

src/detection/sound/sound_haiku.cpp

@@ -0,0 +1,22 @@
+extern "C"
+{
+#include "sound.h"
+}
+#include <MediaRoster.h>
+
+const char* ffDetectSound(FF_MAYBE_UNUSED FFlist* devices /* List of FFSoundDevice */)
+{
+    BMediaRoster* roster = BMediaRoster::Roster();
+    media_node mediaNode;
+
+    roster->GetAudioOutput(&mediaNode);
+
+    int32_t mediaOutputCount = 0;
+    roster->GetAllOutputsFor(mediaNode, NULL, 0, &mediaOutputCount);
+    if (mediaOutputCount == 0)
+        return NULL;
+
+    // TODO: Implement the rest of the function
+
+    return "Not supported on this platform";
+}