add the last of the files and some basic stubs for most of the empty files from last commit

kernel/terminal.h

@@ -8,5 +8,6 @@ void terminal_putchar(char c);
 void terminal_write(const char *str);
 void terminal_setcolor(uint8_t color);
 void terminal_clear(void);
+void update_cursor(void);
 
 #endif