Add initial work on Qt frontend

src/duckstation-qt/gamelistwidget.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "core/game_list.h"
+#include <QtWidgets/QStackedWidget>
+#include <QtWidgets/QTableView>
+
+class GameListModel;
+
+class QtHostInterface;
+
+class GameListWidget : public QStackedWidget
+{
+  Q_OBJECT
+
+public:
+  GameListWidget(QWidget* parent = nullptr);
+  ~GameListWidget();
+
+  void initialize(QtHostInterface* host_interface);
+
+Q_SIGNALS:
+  void bootEntryRequested(const GameList::GameListEntry& entry);
+
+private Q_SLOTS:
+  void onGameListRefreshed();
+  void onTableViewItemDoubleClicked(const QModelIndex& index);
+
+protected:
+  void resizeEvent(QResizeEvent* event);
+
+private:
+  QtHostInterface* m_host_interface = nullptr;
+  GameList* m_game_list = nullptr;
+
+  GameListModel* m_table_model = nullptr;
+  QTableView* m_table_view = nullptr;
+};