Qt: Add new cheat manager

src/duckstation-qt/qtutils.h

@@ -2,10 +2,12 @@
 #include <QtCore/QByteArray>
 #include <QtCore/QMetaType>
 #include <QtCore/QString>
+#include <functional>
 #include <initializer_list>
 #include <optional>
 
 Q_DECLARE_METATYPE(std::optional<bool>);
+Q_DECLARE_METATYPE(std::function<void()>);
 
 class ByteStream;
 
@@ -13,6 +15,7 @@ class QComboBox;
 class QFrame;
 class QKeyEvent;
 class QTableView;
+class QTreeView;
 class QWidget;
 class QUrl;
 
@@ -27,6 +30,7 @@ QWidget* GetRootWidget(QWidget* widget, bool stop_at_window_or_dialog = true);
 /// Resizes columns of the table view to at the specified widths. A negative width will stretch the column to use the
 /// remaining space.
 void ResizeColumnsForTableView(QTableView* view, const std::initializer_list<int>& widths);
+void ResizeColumnsForTreeView(QTreeView* view, const std::initializer_list<int>& widths);
 
 /// Returns a string identifier for a Qt key ID.
 QString GetKeyIdentifier(int key);