Theme Editor: Add `taxonomy.php`, `home.php`, `front-page.php`, `date.php`,...

Theme Editor: Add `taxonomy.php`, `home.php`, `front-page.php`, `date.php`, and `singular.php` to file descriptions.

Props ramiy.
See #35223.
Built from https://develop.svn.wordpress.org/trunk@36087


git-svn-id: https://core.svn.wordpress.org/trunk@36052 1a063a9b-81f0-0310-95a4-ce76da25c4cd