Physics (#3452)

* Content side new physics structure

* BroadPhase outline done

* But we need to fix WorldAABB

* Fix static pvs AABB

* Fix import

* Rando fixes

* B is for balloon

* Change human mob hitbox to circle

* Decent movement

* Start adding friction to player controller

I think it's the best way to go about it to keep other objects somewhat consistent for physics.

* This baby can fit so many physics bugs in it.

* Slight mob mover optimisations.

* Player mover kinda works okay.

* Beginnings of testbed

* More testbed

* Circlestack bed

* Namespaces

* BB fixes

* Pull WorldAABB

* Joint pulling

* Semi-decent movement I guess.

* Pulling better

* Bullet controller + old movement

* im too dumb for this shit

* Use kinematic mob controller again

It's probably for the best TBH

* Stashed shitcode

* Remove SlipController

* In which movement code is entirely refactored

* Singularity fix

* Fix ApplyLinearImpulse

* MoveRelay fix

* Fix door collisions

* Disable subfloor collisions

Saves on broadphase a fair bit

* Re-implement ClimbController

* Zumzum's pressure

* Laggy item throwing

* Minor atmos change

* Some caching

* Optimise controllers

* Optimise CollideWith to hell and back

* Re-do throwing and tile friction

* Landing too

* Optimise controllers

* Move CCVars and other stuff swept is beautiful

* Cleanup a bunch of controllers

* Fix shooting and high pressure movement controller

* Flashing improvements

* Stuff and things

* Combat collisions

* Combat mode collisions

* Pulling distance joint again

* Cleanup physics interfaces

* More like scuffedularity

* Shit's fucked

* Haha tests go green

* Bigmoneycrab

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Client/Physics/Controllers/MoverController.cs

@@ -0,0 +1,36 @@
+#nullable enable
+using Content.Shared.GameObjects.Components.Movement;
+using Content.Shared.Physics.Controllers;
+using Robust.Client.Player;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Physics.Dynamics;
+
+namespace Content.Client.Physics.Controllers
+{
+    public sealed class MoverController : SharedMoverController
+    {
+        [Dependency] private readonly IPlayerManager _playerManager = default!;
+
+        public override void UpdateBeforeSolve(bool prediction, float frameTime)
+        {
+            base.UpdateBeforeSolve(prediction, frameTime);
+
+            var player = _playerManager.LocalPlayer?.ControlledEntity;
+            if (player == null ||
+                !player.TryGetComponent(out IMoverComponent? mover) ||
+                !player.TryGetComponent(out PhysicsComponent? body)) return;
+
+            body.Predict = true; // TODO: equal prediction instead of true?
+
+            // Server-side should just be handled on its own so we'll just do this shizznit
+            if (player.TryGetComponent(out IMobMoverComponent? mobMover))
+            {
+                HandleMobMovement(mover, body, mobMover);
+                return;
+            }
+
+            HandleKinematicMovement(mover, body);
+        }
+    }
+}