Give stores the ability to check for owner only (#26573)

adds a check if the store belongs to the user

Content.Server/Store/Components/StoreComponent.cs

@@ -78,6 +78,13 @@ public sealed partial class StoreComponent : Component
     [ViewVariables, DataField]
     public bool RefundAllowed;
 
+    /// <summary>
+    ///     Checks if store can be opened by the account owner only.
+    ///     Not meant to be used with uplinks.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField]
+    public bool OwnerOnly;
+
     /// <summary>
     ///     The map the store was originally from, used to block refunds if the map is changed
     /// </summary>