2d coord hash moved to hash.hpp file
format version adds suffix to be more coherent
don't use ESM::RefId::sEmpty
RefId equality with string_view, conversion to refId unecessary
action teleport remove test that mCellId is empty
removes some const references, when copy is enough
invalid refid => empty refid
removes useless change
std::pair<int, int> isn't trivially copyable on some compilers
so a specific struct is defined, it's an int pair, but it should be recognised by GCC 11.3 as trivially copyable
Vec2iRefId => ESM3ExteriorCellRefId
more explcit name and use mX,mY instead of pair
renamed files and enum
