Add Pico 2 W Bluepad32 AIO backend

bluepad32_input_backend.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "switch_pro_driver.h"
+
+void bluepad32_input_backend_init();
+void bluepad32_input_backend_start();
+bool bluepad32_input_backend_snapshot(SwitchInputState* out);
+void bluepad32_input_backend_report_sent();
+void bluepad32_input_backend_queue_rumble(const uint8_t rumble[8]);