Changeset 57548 for trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-font-collections-controller.php

REST API: Introduce the necessary endpoints for the font library.

This commits add three endpoints to retrieve and manipulate fonts in WordPress.
This commit also means that we now have a fully functional Font Library in the site editor.

Props get_dave, youknowriad, mmaattiiaass, grantmkin, swissspidy, mcsf, jorbin, ocean90.
See #59166.