screen: implement cursorhome terminal command

src/utils/stdio.c

@@ -4,21 +4,15 @@
 #include <stddef.h>
 #include "../include/string.h"
 
-#ifdef __is_katauos
 #include "../include/screen.h"
-#endif
 
 int puts(const char* string) {
 	return printf("%s\n", string);
 }
 
 int putchar(int ic) {
-#if defined(__is_katauos)
 	char c = (char) ic;
 	terminal_write(&c, sizeof(c));
-#else
-	// TODO: Implement stdio and the write system call.
-#endif
 	return ic;
 }