Mob collisions (#34580)

* Conveyor optimisations

- Optimise movement for moving stuff. Better flags + less resolves + slapped parallelrobustjob on it.
- Sleeping for entities getting conveyed into walls.

* Blocker version

* Finish

* Final

* Mob collisions

* impulses

* Collision smoothing

* Locked in

* 30tps working

* r

* fixes

* Best

* Fixes + CVars

* CVars in place

* Pushies

* Opt attempt 1

* Revert "Opt attempt 1"

This reverts commit 5ccd72dcbea09261a992aa1f7f05df169a1ce676.

* Fix mispredicts

* Ready-ish

* better

* Cleanup

* Fix conveyor power mispredict

* Forgetting to actually do deltas

* Fix buckle pushes

* Bagel save

* Revert "Bagel save"

This reverts commit 1b93fda81fb852d89b89b0beae0b80f8a61165f2.

* Conveyor resave

* Fix prediction

* Mob movement rewrite

* Bandaid

* Working version

* Tentatively working

* Friction to fix cornering

* More fixes

* Revert bagel

* Revert this

* Bad parity

* Working

* Fixes

* Woops

* Doc comments

* Pen cap cvar

* StandingState cleanup and sub

* Fix downed mobs

* fish

* client

* Disable pushing on tests

* More variables

* Movement mods

* Mass diff

* 1 more tweak

* Cvar

Content.Server/Movement/Commands/ToggleMobCollisionCommand.cs

@@ -0,0 +1,24 @@
+using Content.Server.Administration;
+using Content.Shared.Administration;
+using Content.Shared.CCVar;
+using Robust.Shared.Configuration;
+using Robust.Shared.Console;
+
+namespace Content.Server.Movement.Commands;
+
+/// <summary>
+/// Temporary command to enable admins to toggle the mob collision cvar.
+/// </summary>
+[AdminCommand(AdminFlags.VarEdit)]
+public sealed class ToggleMobCollisionCommand : IConsoleCommand
+{
+    [Dependency] private readonly IConfigurationManager _cfgManager = default!;
+
+    public string Command => "toggle_mob_collision";
+    public string Description => "Toggles mob collision";
+    public string Help => Description;
+    public void Execute(IConsoleShell shell, string argStr, string[] args)
+    {
+        _cfgManager.SetCVar(CCVars.MovementMobPushing, !_cfgManager.GetCVar(CCVars.MovementMobPushing));
+    }
+}