Icon CKEditor5 compatibility

Problem/Motivation

In the Status Report on Drupal 10.1.6 the following error is shown:

The following embed button(s) are not using SVG icons and will not be compatible with CKEditor5
File Browser: /files/file_browser_icon.png

Proposed resolution

Provide an SVG version of the icon
(optional) Use the SVG version by default
(optional) Write an update hook to switch from the PNG to the SVG