[desktop] Add basic carousel view (#4112)

Adds a basic carousel view, or essentially a horizontal list a la Android/Qt Quick.

Lacks a lot of niceties like autoscroll, smooth shifts, etc. Will work on those later

Also fixed a bug introduced recently that capped game icon size to 8 at the low end, breaking the None option

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4112
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

src/yuzu/game/game_list.h

@@ -15,12 +15,12 @@
 #include <QVBoxLayout>
 #include <QVector>
 #include <QWidget>
-#include <qabstractitemview.h>
 
 #include "common/common_types.h"
 #include "core/core.h"
 #include "frontend_common/play_time_manager.h"
 #include "qt_common/config/uisettings.h"
+#include "qt_common/game_list/model.h"
 #include "qt_common/util/game.h"
 #include "yuzu/compatibility_list.h"
 
@@ -38,6 +38,9 @@ class MainWindow;
 enum class AmLaunchType;
 enum class StartGameType;
 
+class GameCarousel;
+
+class QAbstractItemView;
 namespace Core {
 class System;
 }
@@ -151,7 +154,9 @@ private:
 
     GameTree* tree_view = nullptr;
     GameGrid* grid_view = nullptr;
+    GameCarousel* carousel_view = nullptr;
     GameListModel* item_model = nullptr;
+    Settings::GameListMode game_list_mode;
 
     ControllerNavigation* controller_navigation = nullptr;