* add getters for frame poses
* fix missing joint in GetJointPose
* clean up models_iqm.cpp
* clean up usage of I_GetTimeFrac, split out matrix calculation into its own function
* clean up SetModelBoneRotationInternal
* clean up a few float <-> double and unsigned <-> signed warnings
* fix more warnings
* further clean up warnings
* split mode ObjectToWorldMatrix stuff
* initial work on bone getters, matrix hell
(the matrix/vec3 multiplications are probably wrong af, just gotta add more stuff 'till i can test it)
* clean up matrix math
* GetBone/TransformByBone
* fix GetBoneFramePose
* fix ObjectToWorldMatrix
* fix missing array resize
* raw matrix getters (for use with gutamatics/etc)
* reverse matrix mult order
* replace GetBoneLength/GetBoneDir with GetBoneBaseTRS
* fix GetBonePosition, remove GetBoneWorldMatrix as it's useless
* GetBonePosition
* deduplicate code
* rename GetBonePosition to GetBoneBasePosition to avoid confusion
* GetBoneBaseRotation
* GetBonePosition helper function
* forgot include_offsets
* making all members protected (but adding friend overrides for the classes which still need it)
* allowing to read data without retrieving the FResourceLump object.
* moved the sprite renaming out of the file system entirely into a caller-provided callback.
* renamed several functions to closer match the terms of a file system.
* moved the VM interface out of the implementation.
This is now being managed by the main file system class. The single lumps should only concern themselves with the actual data they manage, not with how the file system presents them to the outside.
The IWAD detection code was also switched to use a file system wrapper instead of looking at the single files directly.
