cstdint in g++ v15

[talkingerbil]

Tried to build with g++ 15 just now. Just a heads up that you folks are gonna need something akin to this in the near future!

../externals/CLI11/CLI11.hpp:65:1: note: 'uint64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
   64 | #include <vector>
  +++ |+#include <cstdint>```

[pcarruscag]

Thanks, if there is a newer version of cli11 out there you can open a PR to update it.