configure_input_player: Use the npad style set to show the available controllers

This will reduce the likelihood of an invalid controller type to be set within a game

src/yuzu/configuration/configure_input_player.h

@@ -9,6 +9,7 @@
 #include <memory>
 #include <optional>
 #include <string>
+#include <vector>
 
 #include <QWidget>
 
@@ -112,6 +113,15 @@ private:
     /// Update UI to reflect current configuration.
     void UpdateUI();
 
+    /// Sets the available controllers.
+    void SetConnectableControllers();
+
+    /// Gets the Controller Type for a given controller combobox index.
+    Settings::ControllerType GetControllerTypeFromIndex(int index) const;
+
+    /// Gets the controller combobox index for a given Controller Type.
+    int GetIndexFromControllerType(Settings::ControllerType type) const;
+
     /// Update the available input devices.
     void UpdateInputDevices();
 
@@ -151,6 +161,9 @@ private:
     std::unique_ptr<QTimer> timeout_timer;
     std::unique_ptr<QTimer> poll_timer;
 
+    /// Stores a pair of "Connected Controllers" combobox index and Controller Type enum.
+    std::vector<std::pair<int, Settings::ControllerType>> index_controller_type_pairs;
+
     static constexpr int PLAYER_COUNT = 8;
     std::array<QCheckBox*, PLAYER_COUNT> player_connected_checkbox;