AI pickup changes (#1811)

* AI pickup changes

Eating and drinking isn't spammed anymore.
AI can do InRangeUnobstructed checks for item pickups.
AI can open drink cans.

AI littering to be coded.

* #nullable enable

* github's nullable fails are actively shortening my lifespan

* Use a const instead

So it's easier to find given the performance implications.

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

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

@@ -10,20 +10,26 @@ namespace Content.Server.GameObjects.EntitySystems.AI.Steering
         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
+        ///     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>
+        /// <inheritdoc />
         public bool RequiresInRangeUnobstructed { get; }
         
+        /// <summary>
+        ///     To avoid spamming InRangeUnobstructed we'll apply a cd to it.
+        /// </summary>
+        public float TimeUntilInteractionCheck { get; set; }
+        
         public EntityTargetSteeringRequest(IEntity target, float arrivalDistance, float pathfindingProximity = 0.5f, bool requiresInRangeUnobstructed = false)
         {
             _target = target;