feature: clear added to the shell

headers/shell.h

@@ -49,13 +49,14 @@ typedef enum {
 	POWEROFF,
 	HALT,
 	STACK,
+	CLEAR,
 	ECHO,
 	COLOR,
 	MERDELLA,
 	ERROR
 } CMD_TOK;
 
+void shell_init(void);
 void reboot(void);
 void halt(void);
-void shell_init(void);
 void print_stack(void);

headers/terminal.h

@@ -46,6 +46,7 @@ int terminal_write(const char *data, size_t size);
 int terminal_writestring(const char *data);
 int terminal_writelong(long number);
 void terminal_set_screen(int pos);
+void terminal_clear(void);
 struct key_event terminal_getkey(void);
 void update_cursor(void);
 void move_cursor(int direction);