2024-09 Content Prebuild (#15295)

* 202409 subscriber gear

* 2024-09 enchanted armoire gear

* 2024 fall festival gear

* 2024-09 background

* 2024-09 pet quest

* typos and update featuredItems.js

* quest and typo fix

* fix subscriber set name

* text amendments

* update quest title

website/common/script/content/appearance/backgrounds.js

@@ -629,6 +629,9 @@ const backgrounds = {
   backgrounds082024: {
     savanna: { },
   },
+  backgrounds092024: {
+    magic_door_in_forest: { },
+  },
   eventBackgrounds: {
     birthday_bash: {
       price: 0,