Add: init serial + getting text out of it

src/io/serial.h

@@ -0,0 +1,10 @@
+#ifndef SERIAL_H
+#define SERIAL_H
+
+void outb(int port, unsigned char data);
+unsigned char inb(int port);
+
+int serial_init();
+void serial_kputs(const char* str);
+
+#endif