Move plugins to external folder

applications/external/totp/services/hmac/byteswap.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdint.h>
+
+/**
+ * @brief Swap bytes in 32-bit value
+ * @param val value to swap bytes in
+ * @return Value with bytes swapped
+ */
+uint32_t swap_uint32(uint32_t val);
+
+/**
+ * @brief Swap bytes in 64-bit value
+ * @param val value to swap bytes in
+ * @return Value with bytes swapped
+ */
+uint64_t swap_uint64(uint64_t val);