wp-salt.php and wp-cli.yml File present in public_html folder

These are safe.

Normally the contents of wp-salt.php is in the wp-config.php. The reason you site became inaccessible is due to the change in wp-config.php to include wp-salt.php. I.e. include(‘wp-salt.php’);

You can delete wp-salt.php, but be sure to copy the defines into the wp-config.php were the “include(‘wp-salt.php’);” line is and remove the “include(‘wp-salt.php’);” line.

The wp-cli.yml file is part of WP-Cli. I suspect is was created when you ran “wp core verify-checksums”. To be sure, you should read the contents.