add enhancements tab files

src/citra_qt/configuration/configure_enhancements.h

@@ -0,0 +1,22 @@
+#ifndef CONFIGURE_ENHANCEMENTS_H
+#define CONFIGURE_ENHANCEMENTS_H
+
+#include <QWidget>
+
+namespace Ui {
+class ConfigureEnhancements;
+}
+
+class ConfigureEnhancements : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit ConfigureEnhancements(QWidget *parent = nullptr);
+    ~ConfigureEnhancements();
+
+private:
+    Ui::ConfigureEnhancements *ui;
+};
+
+#endif // CONFIGURE_ENHANCEMENTS_H