We still need to include <lol/format> because of platforms that do not have full
C++20 support such as the N******* S*****.

A lot more removals are coming. I’m thinking merging the Application and
ApplicationDisplay classes, as well as removing the corresponding -Data
classes.

I would like lol::image to be accessible in the header-only section of
the framework, which means rethinking the locking mechanism and the way
codecs are exposed to the image class.