Adds a refund button & action upgrades for stores (#24518)

* adds refunds to stores

* Adds method to check for starting map

* comments, datafields, some requested changes

* turns event into ref event

* Adds datafields

* Switches to entity terminating event

* Changes store entity to be nullable and checks if store is terminating to remove reference.

* Tryadd instead of containskey

* Adds a refund disable method, disables refund on bought ent container changes if not an action

* Removes datafield specification

* Readds missing using statement

* Removes unused using statements

* What the heck is listing data

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Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Client/Store/Ui/StoreMenu.xaml

@@ -22,6 +22,11 @@
                     MinWidth="64"
                     HorizontalAlignment="Right"
                     Text="{Loc 'store-ui-default-withdraw-text'}" />
+                <Button
+                    Name="RefundButton"
+                    MinWidth="64"
+                    HorizontalAlignment="Right"
+                    Text="Refund" />
             </BoxContainer>
             <PanelContainer VerticalExpand="True">
                 <PanelContainer.PanelOverride>