Qt: Split Cheat Manager and Memory Scanner

And make them persistent across system invocations.

src/duckstation-qt/cheatmanagerwindow.h

@@ -0,0 +1,74 @@
+// 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 "ui_cheatmanagerwindow.h"
+
+#include "core/cheats.h"
+
+#include <QtCore/QTimer>
+#include <QtWidgets/QComboBox>
+#include <QtWidgets/QLabel>
+#include <QtWidgets/QPushButton>
+#include <QtWidgets/QTableWidget>
+#include <QtWidgets/QWidget>
+#include <optional>
+
+class CheatManagerWindow : public QWidget
+{
+  Q_OBJECT
+
+public:
+  CheatManagerWindow();
+  ~CheatManagerWindow();
+
+Q_SIGNALS:
+  void closed();
+
+protected:
+  void showEvent(QShowEvent* event);
+  void closeEvent(QCloseEvent* event);
+  void resizeEvent(QResizeEvent* event);
+  void resizeColumns();
+
+private Q_SLOTS:
+  CheatList* getCheatList() const;
+  void updateCheatList();
+  void saveCheatList();
+  void cheatListCurrentItemChanged(QTreeWidgetItem* current, QTreeWidgetItem* previous);
+  void cheatListItemActivated(QTreeWidgetItem* item);
+  void cheatListItemChanged(QTreeWidgetItem* item, int column);
+  void activateCheat(u32 index);
+  void setCheatCheckState(u32 index, bool checked);
+  void newCategoryClicked();
+  void addCodeClicked();
+  void editCodeClicked();
+  void deleteCodeClicked();
+  void activateCodeClicked();
+  void importClicked();
+  void importFromFileTriggered();
+  void importFromTextTriggered();
+  void exportClicked();
+  void clearClicked();
+  void resetClicked();
+
+private:
+  enum : int
+  {
+    MAX_DISPLAYED_SCAN_RESULTS = 5000
+  };
+
+  void connectUi();
+  void fillItemForCheatCode(QTreeWidgetItem* item, u32 index, const CheatCode& code);
+
+  QTreeWidgetItem* getItemForCheatIndex(u32 index) const;
+  QTreeWidgetItem* getItemForCheatGroup(const QString& group_name) const;
+  QTreeWidgetItem* createItemForCheatGroup(const QString& group_name) const;
+  QStringList getCheatGroupNames() const;
+  int getSelectedCheatIndex() const;
+
+  Ui::CheatManagerWindow m_ui;
+
+  QTimer* m_update_timer = nullptr;
+};