🚧 Add decryption functions

src/utils/decryptUtilities.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+
+uint32_t getCrc(uint32_t old_crc, unsigned char c);
+
+void updateKeys(uint32_t *key_0, uint32_t *key_1, uint32_t *key_2, unsigned char c);
+
+unsigned char decryptByte(unsigned short keyPart);