How to use readlines in Minishell

This is still a WIP

Documentation links

name	library	description	return	required for
readline	stdio.h	reads a line from the terminal and returns it	NULL if EOF, empty for empty line, returns text of line as char*, needs to be free'd	reading input from the terminal
rl_clear_history	stdio.h	deletes all entries in history	none, void function	not sure yet
rl_on_new_line	stdio.h	tells the update routine that we have moved onto a new (empty) line
rl_replace_line	stdio.h	Replace the contents of rl_line_buffer with text passed as argument. The point and mark are preserved, if possible. If clear_undo (second argument) is non-zero, the undo list associated with the current line is cleared.
rl_redisplay	stdio.h	change what's displayed on the screen to the current content of rl_line_buffer	none, void function
add_history	stdio.h	string passed as argument is placed at the end of the history list	none, void function	adding custom history, not sure yet