Try support havok2018

[qiankanglai]

Hi,

I just finish supporting EldenRing with Havok2018 at https://github.com/qiankanglai/HavokLib/tree/havok2018. File formats seem keeping the same except .compendium is added (storing content across files I guess).

Also two diff I didn't commit yet:

bool IsEOF() const { return !baseStream || baseStream->eof(); } in binreader_stream.hpp and CRule rule(root->toolset, true, true); // No way to detect so far in format_new.cpp.

Still working to find if any way to determine CRule