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.Shared/GameObjects/Components/Movement/SharedClimbingComponent.cs

@@ -0,0 +1,66 @@
+using Content.Shared.GameObjects.EntitySystems;
+using Content.Shared.Physics;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Components;
+using Robust.Shared.Physics;
+using Robust.Shared.Serialization;
+using System;
+
+namespace Content.Shared.GameObjects.Components.Movement
+{
+    public abstract class SharedClimbingComponent : Component, IActionBlocker, ICollideSpecial
+    {
+        public sealed override string Name => "Climbing";
+        public sealed override uint? NetID => ContentNetIDs.CLIMBING;
+
+        protected ICollidableComponent Body;
+        protected bool IsOnClimbableThisFrame = false;
+
+        protected bool OwnerIsTransitioning
+        {
+            get
+            {
+                if (Body.TryGetController<ClimbController>(out var controller))
+                {
+                    return controller.IsActive;
+                }
+
+                return false;
+            }
+        }
+
+        public abstract bool IsClimbing { get; set; }
+
+        bool IActionBlocker.CanMove() => !OwnerIsTransitioning;
+        bool IActionBlocker.CanChangeDirection() => !OwnerIsTransitioning;
+
+        bool ICollideSpecial.PreventCollide(IPhysBody collided)
+        {
+            if (((CollisionGroup)collided.CollisionLayer).HasFlag(CollisionGroup.VaultImpassable) && collided.Entity.HasComponent<IClimbable>())
+            {
+                IsOnClimbableThisFrame = true;
+                return IsClimbing;
+            }
+
+            return false;
+        }
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            Owner.TryGetComponent(out Body);
+        }
+
+        [Serializable, NetSerializable]
+        protected sealed class ClimbModeComponentState : ComponentState
+        {
+            public ClimbModeComponentState(bool climbing) : base(ContentNetIDs.CLIMBING)
+            {
+                Climbing = climbing;
+            }
+
+            public bool Climbing { get; }
+        }
+    }
+}