Qt: Turn tweaks/hacks into a table

Also move PGXP CPU mode/vertex cache to advanced options

src/duckstation-qt/advancedsettingswidget.h

@@ -1,5 +1,5 @@
 #pragma once
-
+#include <QtCore/QVector>
 #include <QtWidgets/QWidget>
 
 #include "ui_advancedsettingswidget.h"
@@ -16,9 +16,40 @@ public:
   ~AdvancedSettingsWidget();
 
 private:
+  struct TweakOption
+  {
+    enum class Type
+    {
+      Boolean,
+      IntRange
+    };
+
+    Type type;
+    QString description;
+    std::string key;
+    std::string section;
+
+    union
+    {
+      struct
+      {
+        bool default_value;
+      } boolean;
+
+      struct
+      {
+        int min_value;
+        int max_value;
+        int default_value;
+      } int_range;
+    };
+  };
+
   Ui::AdvancedSettingsWidget m_ui;
 
   void onResetToDefaultClicked();
 
   QtHostInterface* m_host_interface;
+
+  QVector<TweakOption> m_tweak_options;
 };