GCC 13 stopped including `cstdint` (and other headers) transitively
in most scenarios, causing build failures in programs that relied
on that behavior.
This change adds a missing `cstdint` include via patch to the
`crossfire-server` source, fixing such a build failure.
This adds the Crossfire server package and the corresponding data packages
(maps and archetypes).
Note that this tracks a recent SVN commit; the latest official release is
many years old and no longer widely used (or supported).
