How do I add my own scripts to the add_action(‘wp_enqueue_scripts’) function?

You removed all of the actions from wp_head, one of those actions
prints scripts and styles. You probably want to dequeue all other
scripts and styles rather than disable the entire enqueue system.

Yes

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)