* split frame info calculation from RenderFrameModels
* clean up fvec4 being used as quat in iqms
* initial work on bone setting
* implement bone setters
* clean up FindModelFrame
* refactor model overrides into its own function
* refactor frame rendering into RenderModelFrame
* split frame processing into ProcessModelFrame
* refactor BoneOverride in preparation for translation/scale overrides
* clean up macros
* SetBoneTranslation/SetBoneScaling
* GetBoneOffset
* fix compilation on linux/mac (fuck you MSVC)
* fix typo 😅
* make sure bone overrides are cleared on model switches, add ClearBoneOffsets to clear them manually
* bone info getters
* fix joint lengths, add joint dirs
* serialize bone overrides
* fix bone dir return type
* GetBoneIndex/GetBoneCount
* helper functions for working with non-quat angles
* add mode enum, add more helper functions
* fix up formatting
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