Pet Carrier (Zookeeper gameplay?) (#21545)

* add visual

* fix item + entityStorage problem, add generation in maints

* make pet carrier two-handed

* added to cargo

* add resistlocker component

Content.Shared/Storage/Components/SharedEntityStorageComponent.cs

@@ -1,4 +1,4 @@
-using System.Numerics;
+using System.Numerics;
 using Content.Shared.Physics;
 using Content.Shared.Whitelist;
 using Robust.Shared.Audio;
@@ -64,6 +64,12 @@ public abstract partial class SharedEntityStorageComponent : Component
     [DataField, ViewVariables(VVAccess.ReadWrite)]
     public float EnteringRange = 0.18f;
 
+    /// <summary>
+    /// If true, there may be mobs inside the container, even if the container is an Item
+    /// </summary>
+    [DataField]
+    public bool ItemCanStoreMobs = false;
+
     /// <summary>
     /// Whether or not to show the contents when the storage is closed
     /// </summary>