Qt: Redesign graphics settings panel

Add screenshot format/type.

src/duckstation-qt/interfacesettingswidget.h

@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#pragma once
+
+#include <QtWidgets/QWidget>
+
+#include "ui_interfacesettingswidget.h"
+
+class SettingsWindow;
+
+class InterfaceSettingsWidget : public QWidget
+{
+  Q_OBJECT
+
+public:
+  explicit InterfaceSettingsWidget(SettingsWindow* dialog, QWidget* parent);
+  ~InterfaceSettingsWidget();
+
+private Q_SLOTS:
+  void onRenderToSeparateWindowChanged();
+
+private:
+  Ui::InterfaceSettingsWidget m_ui;
+
+  SettingsWindow* m_dialog;
+
+public:
+  static const char* THEME_NAMES[];
+  static const char* THEME_VALUES[];
+  static const char* DEFAULT_THEME_NAME;
+};