Refactor AI movement (#1222)

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

Content.Server/GameObjects/EntitySystems/AI/Steering/EntityTargetSteeringRequest.cs

@@ -0,0 +1,35 @@
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Map;
+
+namespace Content.Server.GameObjects.EntitySystems.AI.Steering
+{
+    public sealed class EntityTargetSteeringRequest : IAiSteeringRequest
+    {
+        public SteeringStatus Status { get; set; } = SteeringStatus.Pending;
+        public MapCoordinates TargetMap => _target.Transform.MapPosition;
+        public GridCoordinates TargetGrid => _target.Transform.GridPosition;
+        public IEntity Target => _target;
+        private IEntity _target;
+        /// <inheritdoc />
+        public float ArrivalDistance { get; }
+        /// <inheritdoc />
+        public float PathfindingProximity { get; }
+        /// <summary>
+        /// How far the target can move before we re-path
+        /// </summary>
+        public float TargetMaxMove { get; } = 1.5f;
+
+        /// <summary>
+        /// If we need LOS on the entity first before interaction
+        /// </summary>
+        public bool RequiresInRangeUnobstructed { get; }
+        
+        public EntityTargetSteeringRequest(IEntity target, float arrivalDistance, float pathfindingProximity = 0.5f, bool requiresInRangeUnobstructed = false)
+        {
+            _target = target;
+            ArrivalDistance = arrivalDistance;
+            PathfindingProximity = pathfindingProximity;
+            RequiresInRangeUnobstructed = requiresInRangeUnobstructed;
+        }
+    }
+}