Verify that data is correctly ordered and reject packets that aren't. Also generates a random game id to ensure packets are coming from legitimate clients.
* 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
Rewrote lobby to unify common and Doom-specific packet structure, allowing for saner handling of in-game joining. Added a new per-client stage system that allows individual clients to be handled at a time when gathering and sharing info. Reworked lobby UI to display user info and added kick/ban functionalities. Bans are only a temporary per-game IP ban (use passwords to keep unwanted users out). Increased max player count to 64 and unified engine constant.
Rewrote netcode to be more stable and functional. Packet-server mode has been restrategized and will now be the default netmode when playing with 3+ non-LAN players. TryRunTics has been cleaned up with older tick control behavior removed to account for the rewritten renderer. The main thread is now more consistent when playing online to prevent potential slow downs and lock ups. Load barriers are better accounted for to prevent spikes on level transition. Improvements to chat and lobby systems including a force start game button. Added a suite of new host options such as kicking and controlling who can pause the game. Max players increased from 8 to 16 since the new code can now handle it.
Note: Demo functionality is untested. This will be rewritten at a later time alongside improvements to GZDoom's playback features (e.g. freecam mode).
Added "game in progress" message for players trying to join late. Improved "unknown host" packet logging to only log when truly unknown. Correctly abort network window so game can process fatal errors instead of hanging on waiting to connect. Unexpected disconnects in lobby now correctly update the state of the game.
