Broadphase refactor (#1848)

* Broadphase refactor

* Stuff

* Working

* TODO

* Changes

* Which fucking madman came up with this shit

* Known gud state

* Kinda shitcodey but it works so fuck it doin it live

* Shuttle jankiness

* Refactor entitylookups to be 30% more based

* Refactor gucci

* Done?

* Fix most tests

* nothing suss

* Vera single-handedly saving shuttles

* fex

* Fix renderingtreecomp for relativity

* Fix IEntityLookup

* Fixes

* Testing jank please revert some of it before merging

* Fix the remaining bugs

* Fix crash

* Fix grid physics initialization

* Shuttle collisions working

* Fixes

* Fixes

* Velocity on transfers

* Velocity on parent change

* Fixes

* world angular velocity too

* Slightly faster map velocities

* showbb revert

* Sketch grids kinda workin

* Fix PVS contact crash

* Cleanup gridfixture updates 0.1%

* Grid fixtures

* AAAAAAAAAAAAAAA

* a

* termp

* Fixes

* Test reversion reversion?

* Tests

* Fix Equals

* Slight box2i cleanup

* Better initializer

* Fix merge issues

* Shuttles go BRRT

* Remove MoveProxy from DynamicTreeBroadphase

* Optimise a shit tonne

* Approx

* fix showbb

* clean

* Slightly more optimised

* My almonds are activating

* Contact transform caching

* Avoid duplicates

* Typo

* Logger

* Jitter 1% better

* Okay shit maybe that's not it.

* Contact fixes

* Move check thingy up front

* Revert some jank caching

* Contact filtering

* Fix master merge

* Test fixes

* Re-fix MapLoaderTest

* Use proxies instead

* uhh wtf?

* Woops

* Fix collisions

* Fix grid fixture generation

* Fix deserializing

* Tile window fix

* Cleanup broadphase

* Bit more cleanup

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

Robust.UnitTesting/Shared/Map/MapManager_Tests.cs

@@ -6,6 +6,7 @@ using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
+using Robust.Shared.Physics;
 using Robust.Shared.Physics.Broadphase;
 
 namespace Robust.UnitTesting.Shared.Map
@@ -21,7 +22,7 @@ namespace Robust.UnitTesting.Shared.Map
             var mock = new Mock<IEntitySystemManager>();
             var broady = new BroadPhaseSystem();
             var physics = new PhysicsSystem();
-            mock.Setup(m => m.GetEntitySystem<SharedBroadPhaseSystem>()).Returns(broady);
+            mock.Setup(m => m.GetEntitySystem<SharedBroadphaseSystem>()).Returns(broady);
             mock.Setup(m => m.GetEntitySystem<SharedPhysicsSystem>()).Returns(physics);
 
             IoCManager.RegisterInstance<IEntitySystemManager>(mock.Object, true);