I have found
edit-form-advance.php in /admin/ that contain layout of edit-post page
Have any way to customize layout via
add_action(); ? because I didn't want to edit directly within Wordpress admin file.
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Seeing the image you posted, you have two sane options:
Considering that eitherway a rewrite is needed, I recommend using the frontend.
If you really want, you could hide all the metaboxes etc on the edit page and add your own at the bottom, but, this is 95% of the work for the above, in addition to hiding all the rest and tracking changes across versions, and the eventual maintenance nightmare.
wp_update_post, this will be the function you use to update the post in your save routine when the form is submitted