Add Cotton Burgers (#36405)

* Adds cotton burgers

* Rephrased copyright

* Added an extra comment

* Adds CottonBurger to tags.yml, Not sure if i am supposed to do this or not.

* Reordered Cotton bun YAML, and fixed overwritten tags

* Merge issue fix?

* Add experiment plushie and remove rubber chicken from cotton burgers

* Minor comment change

---------

Co-authored-by: beck-thompson <beck314159@hotmail.com>

Content.Server/Nutrition/EntitySystems/FoodSequenceSystem.cs

@@ -9,6 +9,7 @@ using Content.Shared.Nutrition.Components;
 using Content.Shared.Nutrition.EntitySystems;
 using Content.Shared.Nutrition.Prototypes;
 using Content.Shared.Popups;
+using Content.Shared.Storage.Components;
 using Content.Shared.Tag;
 using Robust.Server.GameObjects;
 using Robust.Shared.Prototypes;
@@ -129,6 +130,13 @@ public sealed class FoodSequenceSystem : SharedFoodSequenceSystem
             return false;
         }
 
+        // Prevents plushies with items hidden in them from being added to prevent deletion of items
+        // If more of these types of checks need to be added, this should be changed to an event or something.
+        if (TryComp<SecretStashComponent>(element, out var stashComponent) && stashComponent.ItemContainer.Count != 0)
+        {
+            return false;
+        }
+
         //Generate new visual layer
         var flip = start.Comp.AllowHorizontalFlip && _random.Prob(0.5f);
         var layer = new FoodSequenceVisualLayer(elementIndexed,