feat(drivers): add port I/O helpers and serial COM1 driver

include/serial.h

@@ -0,0 +1,10 @@
+#ifndef FROSTBYTE_SERIAL_H
+#define FROSTBYTE_SERIAL_H
+
+#include "types.h"
+
+void serialInit(void);
+void serialWrite(char c);
+void serialWriteString(const char* str);
+
+#endif