Gate controller pairing behind BOOTSEL

tests/bootsel_native_stubs/pico/flash.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <cstdint>
+
+#define __no_inline_not_in_flash_func(function_name) function_name
+
+constexpr int PICO_OK = 0;
+
+int flash_safe_execute(void (*function)(void*), void* parameter,
+                       uint32_t enter_exit_timeout_ms);

tests/bootsel_native_stubs/pico/time.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <cstdint>
+
+using absolute_time_t = uint64_t;
+
+absolute_time_t get_absolute_time();
+uint64_t to_ms_since_boot(absolute_time_t time);