* fix serialization
Was incorrect before. The only flags are if any data in the FrameStats has changed, you write them again. Velocities also do not use dirty flags for their values, they use a flag to determine if their velocity if zero or non-zero. if any velocity changes, re-write FrameStats.
Tested that 2 players can see each other move as before, enemies move as before and players racing is identical as before.
* Update HavokVehiclePhysicsComponent.cpp
* allow usage of NiPoint3 and NiQuaternion in constexpr context
* removed .cpp files entirely
* moving circular dependency circumvention stuff to an .inl file
* real world usage!!!!!
* reverting weird branch cross-pollination
* removing more weird branch cross-pollination
* remove comment
* added inverse header guard to inl file
* Update NiPoint3.inl
* trying different constructor syntax
* reorganize into .inl files for readability
* uncomment include
* moved non-constexpr definitions to cpp file
* moved static definitions back to inl files
* testing fix
* moved constants into seperate namespace
* Undo change in build-and-test.yml
* nodiscard
