Citizen/animgraph: rework input-based lean layers
The upper body lean component now works much better, and is nicely staggered with the additive pelvis position component. A copy of the system, with different settings, is now applied while crouching, which improves settling back to idle. The upper body bit is still a bit hacky due to the lack of model-space additive support, but this works OK enough for now. The entire system is composited in *before* the "center delta" system, so it can't stomp any non-default idle poses anymore.
FPArms: many changes involving moving stuff into the first person arms VMDL for easier sharing & genericization (see commit comment)
• removed hold_* bones
• added weapon_root, weapon_root_children, weapon_IK_hand_*, and hand_*_to_weapon_ikrule, following the same hierarchy as existing weapons (weapon_root is a separate root bone)
• weapon_root_children is a new bone between weapon_root and the children ("trigger", "magazine", etc. and the IK bones); this is so that weightlists can be moved into the arms VMDL instead of having to be explicitly defined in each weapon. Only part-specific weightlists (e.g. "mode_selector" for the MP5 knob) need to exist as part of weapon VMDLs now.
• transferred common weightlists involving weapon_root
• debug gizmo meshes (reminder: they're in a bodygroup) now show the weapon IK targets & the weapon_root bone
• added "shared" animationlist prefab which holds generic template anims that weapons can reuse; the goal is to make these as independent from each other as possible (no interlocking references), more to come soon
Citizen/animgraph: improved jumping feel by making the body & legs lean towards the landing direction
This exploits the system used to partially reflect your input while airborne, but it now *reverses it* once the initial jump impulse is over. https://files.facepunch.com/maxlebled/1b0311b1/2023-09-03%2021-51-46.mp4