Qt: Skeleton for audio settings

src/duckstation-qt/audiosettingswidget.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <QtWidgets/QWidget>
+
+#include "ui_audiosettingswidget.h"
+
+class QtHostInterface;
+
+class AudioSettingsWidget : public QWidget
+{
+  Q_OBJECT
+
+public:
+  explicit AudioSettingsWidget(QtHostInterface* host_interface, QWidget* parent = nullptr);
+  ~AudioSettingsWidget();
+
+private:
+  Ui::AudioSettingsWidget m_ui;
+
+  QtHostInterface* m_host_interface;
+};