Add skin for subscription interstitial

ElvUI/Modules/Skins/Blizzard/Load_Blizzard.xml

@@ -92,6 +92,7 @@
 	<Script file='PlayerChoice.lua'/>
 	<Script file='Runeforge.lua'/>
 	<Script file='Soulbinds.lua'/>
+	<Script file='SubscriptionInterstitial.lua'/>
 	<Script file='TorghastLevelPicker.lua'/>
 	<Script file='WeeklyRewards.lua'/>
 </Ui>

ElvUI/Modules/Skins/Blizzard/SubscriptionInterstitial.lua

+local E, L, V, P, G = unpack(select(2, ...)); --Import: Engine, Locales, PrivateDB, ProfileDB, GlobalDB
+local S = E:GetModule('Skins')
+
+local _G = _G
+
+-- /run SubscriptionInterstitial_LoadUI(); _G.SubscriptionInterstitialFrame:Show()
+
+function S:Blizzard_SubscriptionInterstitialUI()
+    print(1)
+    if not (E.private.skins.blizzard.enable and E.private.skins.blizzard.subscriptionInterstitial) then return end
+
+    local SubscriptionInterstitial = _G.SubscriptionInterstitialFrame
+
+    SubscriptionInterstitial:StripTextures()
+    SubscriptionInterstitial:CreateBackdrop('Transparent')
+    SubscriptionInterstitial.ShadowOverlay:Hide()
+
+    S:HandleCloseButton(SubscriptionInterstitial.CloseButton)
+    S:HandleButton(SubscriptionInterstitial.ClosePanelButton)
+end
+
+S:AddCallbackForAddon('Blizzard_SubscriptionInterstitialUI')

ElvUI/Settings/Private.lua

@@ -152,6 +152,7 @@ V.skins = {
 		guide = true,
 		playerChoice = true,
 		soulbinds = true,
+		subscriptionInterstitial = true,
 		runeforge = true,
 		weeklyRewards = true,
 		torghastLevelPicker = true,