Climbing system (#1750)

* Initial commit

* Climbing uses its own controller now

* Missed a check

* Get rid of hands check

* Cleanup

* Get rid of speciescomponent stuff

* Remove unneeded check, add separate case for moving other players.

* Add DoAfter

* IClientDraggable added to ClimbingComponent

* Added some basic integration tests. Renamed ClimbMode to Climbing.

* oops

* Minor fixes

* ffff

* Table fix

* Revamped system so its more predicted, uses proper  logic for de-climbing. Get hype!!!

* Flag check fix

* Distance check and reset numticksblocked

* get rid

Content.IntegrationTests/Tests/GameObjects/Components/Movement/ClimbUnitTest.cs

@@ -0,0 +1,64 @@
+#nullable enable
+
+using System.Threading.Tasks;
+using NUnit.Framework;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Map;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+using Content.Server.GameObjects.Components.Movement;
+using Content.Shared.Physics;
+using Robust.Shared.GameObjects.Components;
+
+namespace Content.IntegrationTests.Tests.GameObjects.Components.Movement
+{
+    [TestFixture]
+    [TestOf(typeof(ClimbableComponent))]
+    [TestOf(typeof(ClimbingComponent))]
+    public class ClimbUnitTest : ContentIntegrationTest
+    {
+        [Test]
+        public async Task Test()
+        {
+            var server = StartServerDummyTicker();
+
+            IEntity human;
+            IEntity table;
+            IEntity carpet;
+            ClimbableComponent climbable;
+            ClimbingComponent climbing;
+
+            server.Assert(() =>
+            {
+                var mapManager = IoCManager.Resolve<IMapManager>();
+                mapManager.CreateNewMapEntity(MapId.Nullspace);
+
+                var entityManager = IoCManager.Resolve<IEntityManager>();
+
+                // Spawn the entities
+                human = entityManager.SpawnEntity("HumanMob_Content", MapCoordinates.Nullspace);
+                table = entityManager.SpawnEntity("Table", MapCoordinates.Nullspace);
+
+                // Test for climb components existing
+                // Players and tables should have these in their prototypes.
+                Assert.True(human.TryGetComponent(out climbing), "Human has no climbing");
+                Assert.True(table.TryGetComponent(out climbable), "Table has no climbable");
+
+                // Now let's make the player enter a climbing transitioning state.
+                climbing.IsClimbing = true;
+                climbing.TryMoveTo(human.Transform.WorldPosition, table.Transform.WorldPosition);
+                human.TryGetComponent(out ICollidableComponent body);
+
+                Assert.True(body.HasController<ClimbController>(), "Player has no ClimbController");
+
+                // Force the player out of climb state. It should immediately remove the ClimbController.
+                climbing.IsClimbing = false;
+
+                Assert.True(!body.HasController<ClimbController>(), "Player wrongly has a ClimbController");
+
+            });
+
+            await server.WaitIdleAsync();
+        }
+    }
+}