[!!!][TASK] Switch from MIME to Media Types
The term MIME type is outdated, at least if used in a web context. The correct
term is "Internet Media Type". Furthermore, our list of MIME types (or media
types) was not up to date.
This patch introduces a new utility class "MediaTypes" which replaces
"FileTypes". Along with the new class comes a script which allows the core team
to conveniently update the list of Media Types and filename extensions.
This is a breaking change as the FileTypes class is deprecated with it. The old
methods are still available but should not be used anymore. A code migration to
use the new ones instead is shipped with the change.