Renamed tty.h to stdio.h

Added puts() declaration

include/stdio.h

@@ -1,10 +1,11 @@
 #pragma once
 
-#include <stddef.h>
 #include <stdarg.h>
 
 int putchar(int c);
 
+int puts(const char *str);
+
 int printf(const char *format, ...);
 
 int sprintf(char *str, const char *format, ...);