Note that the features are not actually bound to the build system, but they
are already configurable and written to the .user file.

This will allow us to compress resources one day, and read them
transparently.

This is useful for referencing projects that link with static libraries, so
that they can force some objects to be linked into the executable even if
none of their symbols is used.

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.